Chronology of Deep Time

In Lovecraftian canon, both the Earth and the wider solar system have had a long a storied history of various intelligent beings and Godlike entities interacting with it. An abridged timeline of these events appears below:

* **4.6 Billion Years Ago:** The planet Earth forms from the protoplanetary disc.
* **4.5 Billion Years Ago:** Mnomquah passes through the solar system. It strikes Earth at a shallow angle before reforming and proceeding along its course, and shattered debris from It and the Earth eventually coalesce into the Moon.
* **4.1 Billion Years Ago:** The Noachian Period begins on Xandra. During this time it has a thicker atmosphere, abundant liquid water within the Oceanus Borealis, and volcanic activity. It is around this time that Martian life begins to develop.
* **4 Billion Years Ago:** Ylidiomph and Cykranosh fall into a 2:1 orbital resonance, moving L'gy'hx and Yaksh farther from the Sun and forming the Kuiper Belt, scattered disc, and Oort Cloud. This also causes the Late Heavy Bombardment, scarring the face of the Moon and potentially liquifying the surface of the Earth. The thermal flux caused on Earth may have made it more conducive to abiogenesis. Xandra recieves many topographical features at this time, and is struck by a planetoid which creates the smooth Borealis Basin that covers roughly 40% of the planet. The regular impacts also warm Xandra considerably and may have contributed to its eventual loss of atmosphere via impact erosion.
* **3.9 Billion Years Ago:** Chemautrophic prokaryotes appear, while a large impact on the Moon forms the Nectaris Basin--beginning the lunar Nectarian Period.
* **3.8 Billion Years Ago:** A lunar impact creates the huge Mare Imbrium Basin, beginning the lunar Imbrian Period. The Moon also enters a period of volcanic activity for the next half a billion years that forms most of the mare basalts that constitute its later dark grey spots.
* **3.7 Billion Years Ago:** As Xandra transitions from the Noachian Period to the Hesperian Period, it becomes colder, dryer, and more arid. This triggers Martian life adapting to land.
* **3.5 Billion Years Ago:** The Earth's magnetic field forms, preventing its atmosphere from being stripped away by solar wind. Unfortunately, Xandra will not escape this fate. Martian life diversifies, eventually creating the distant ancestors of the Aihai.
* **3 Billion Years Ago:** Photosynthetic cyanobacteria evolve and begin dumping mass quantities of oxygen into the atmosphere, causing the formation of iron ore and essentially rusting the Earth. The Moon is still very near its parent, meaning the tides of this period are 305 meters high. Some extremely simple terrestrial life migrates to land during this period. Xandra transitions from the Hesperian Period to the Amazonian Period, taking on general attributes very similar to those it has today. To escape the inhospitable conditions, the Aihai enter a sort of stasis deep beneath the planet's surface, where they are eventually discovered and reawakened by humanity. Unfortunately, the more alien and sinister forms of life on the planet utilize a similar tactic.
* **2.5 Billion Years Ago:** The continued oxygenation causes the Great Oxygenation Event, wiping out vast swathes of Earth's microbial life to whom oxygen is caustic. The oxygen also supplants atmospheric methane and causes the Huronian Glaciation, a snowball Earth episode lasting from 2.4 to 2.1 Billion Years Ago.
* **1.8 Billion Years Ago:** Eukaryotes and bacterial viruses appear, and the Earth finally develops an oxidizing atmosphere.
* **1.2 Billion Years Ago:** Sexual reproduction has evolved on Earth, increasing genetic diversity. Multicellular life begins to develop, mostly consisting of simple cell colonies and red algae.
* **1 Billion Years Ago:** The 'Ithra arrive on Earth, landing in the ocean on the Antarctic plate and founding their first city there. The 'Ithra create the proto-shoggoth, the Ubbo-Sathla, which in turn produces other creatures to act as servitors and food. Zuchequon, M'nagalah, and Yidhra are eventually spawned by this tool accidentally. The 'Ithra also use It to engineer the Shoggoth. During this time, the 'Ithra also colonize Venus, which still bears hospitable temperatures and a wet surface. Some time after the 'Ithra arrive, the last lunar volcanic event occurs, creating the Oceanus Procellarum.
* **900 Million Years Ago:** By this time, Elder Thing cities have spread throughout the oceans of Earth. A lunar impact creates the 93 kilometer-wide Copernicus Crater.
* **875-850 Million Years Ago:** The Tonian Glaciation occurs. It may be during this period that Yig came to Earth.
* **800 Million Years Ago:** The 'Ithra begin to adapt their civilization to land, migrating to the surface along the equitorial region where future glaciations would have less impact. Many remain in the oceans, however.
* **775-750 Million Years Ago:** The Kaigas Glaciation, if it constituted such, occurs and the earliest know supercontinent--Rodinia--begins to break up. The Flying Polyps arrive to Earth from the Scutum-Centaurus arm of the Milky Way with the Cone Beings in tow. Together, they begin building their civilization of basalt towers upon the land. They eventually attempt to expand into the oceans, sparking a bitter war with the 'Ithra. Ultimately, the 'Ithra are victorious.
* **725-700 Million Years Ago:** The Sturtian Glaciation occurs.
* **675 Million Years Ago:** The Cryogenian Glaciation occurs.
* **650 Million Years Ago:** The Marinoan Glaciation--the most significant of the glaciations since the Huronian--occurs. It may be around this time that Cyäegha arrived on Earth and hid Itself away.
* **625-600 Million Years Ago:** The Ediacaran Glaciation occurs.
* **600-540 Million Years Ago:** An ozone layer forms and native life no longer needs chemical components for attenuating ultraviolet light to inhabit the surface. The fragments of Rodinia recombine to form Pannotia.
* **560 Million Years Ago:** The Gaskiers Glaciation occurs.
* **550 Million Years Ago:** Great Cthulhu arrives to Earth within R'lyeh along with a host of lesser Old Ones from the Perseus Arm of the Milky Way. Yig reacts to this in Its inexplicable way by cultivating complex life on Earth, thereby causing the Cambrian Explosion.
* **540 Million Years Ago:** The supercontinent of Pannotia breaks up.
* **535-530 Million Years Ago:** Arthropods, echinoderms, mollusks, and etc. develop in the oceans. The first footprints of terrestrially-evolved life appear.
* **510 Million Years Ago:** Nautaloids appear.
* **485 Million Years Ago:** Elder Thing experimentation leads to the creation of the first true vertebrates, jawless fish, which they allow to propagate and evolve.
* **447-4 Million Years Ago:** The Earth passes through the Milky Way's arms, causing Great Cthulhu to awaken. This leads to Gondwana and eventually the entire planet glaciating in the Ordovician-Silurian Mass Extinction.
* **434 Million Years Ago:** Plants descended from green algae migrate to land, possibly aided by fungi through symbiosis.
* **420 Million Years Ago:** The earliest ray-finned fish, trigonotarbid arachnids, and land scorpions appear.
* **400-395 Million Years Ago:** The first known tetrapod tracks onto land. Around this time, the supercontinent of Euramerica is formed. The Great Race of Yith, fleeing catastrophe on their homeworld, migrate to the Earth by exchanging their minds with those of the Cone Beings en masse. Once on the planet, they swiftly organize and exterminate the surviving Cone Beings and ultimately inflict a genocidal war upon the Flying Polyps that culminates in those entities being forced deep underground. Once the situation stabilizes, they set to work building their library-city of Pnakotus in what will become modern-day Australia. The Venusian 'Ithra have lost the capability for space flight by this time, due to atrophy. They ultimately compensate for this deficit by developing interplanetary ships.
* **360 Million Years Ago:** Great Cthulhu rises and possibly causes a mass extinction, leading to Romer's Gap. The disaster also destroys several major Elder Thing settlements. The 'Ithra attempt to war with Cthulhu, eventually calling the aid of their Venusian kin. While Cthulhu initially puts up a token resistence because Its "opponents" are beneath Its notice, the reinforcements raise them to the status of a nuisance. Consequently, It responds by halting the rotation of Venus--leading not only to planet-wide catastrophe, but to the swift build of internal pressure until a full planetary resurfacing event occurs. The Venusian colony likely realizes its mistake around the time the oceans flash boil. Great Cthulhu remains within Its territory and resumes ignoring the 'Ithra once they call off hostilities, with the latter giving Its domain a very wide berth in the future. Around this time a number of the Yuggoth Event's survivors migrate to Earth--including the Yuggya, as well as Rhan-Tegoth, Chaugnar Faugn, and Ghatanothoa. Chaugnar Faugn uses the four-limbed tetrapods adapting to land at this time to create the Miri Nigri. Ghatanothoa, on the other hand, collects many of the Yuggya and insinuates Itself into R'lyeh, claiming the portion known as Yaddith-Gho.
* **350 Million Years Ago:** The first sharks appear.
* **305 Million Years Ago:** Diapsid reptiles arise on Earth due to Yig's interference. Around this time the continents come together to form Pangaea. The Cykranosh Event occurs on Nis, destroying the moon and turning it into a ring system. The Event raises Hziulquoigmnzhah to the status of a full Lloigor, and creates the lloigornos Y'golonac, Atlach-Nacha, and Shudde M'ell, as well as the servitors of these latter two. A splinter Miri Nigri cult to Cyäegha is founded, eventually collapsing as its head becomes the first Vaeyen, the Black Light, parasitizing Cyäegha's power.
* **252 Million Years Ago:** Great Cthulhu awakens and brings about the End Permian Mass Extinction, killing off 90-95% of native marine life. During the confusion, the Shoggoth rebels, but is eventually resubjugated. The 'Ithra use nuclear weapons--or perhaps some form of matter/energy conversion device--while combating their creation, causing the Wilkes Land Crater in Antarctica and the Bedout Structure off the northwest coast of Australia in the process, alongside other Permian Boundary craters. During the brief period of freedom a small Shoggoth cult to Cyäegha is formed, collapsing as it collectively ascends into the second Vaeyen, the White Fire which is Blacker than Night. Nug and Yeb may have arrived on Earth within Harag-Kolath at this point in time, contributing to the latter abundance of sapient species which evolved throughout the planet's later career.
* **250 Million Years Ago:** If the G'harne Fragments are to be believed, the city of G'harne had been built by the Triassic Period, suggesting that Shudde M'ell and Its servitors had arrived on Earth by this time alongside other survivors of the Cykranosh Event, all fleeing the hunger of Hziulqiougmnzhah. More likely than not, this is the period in which Y'golonac arrived on Earth.
* **225 Million Years Ago:** The first mammals evolve, as do the first dinosaurs--the prosauropods in the latter case. Atlach-Nacha arrives with both Its servitors and Tsathoggua in tow, lairing in the volcanic region that would eventually rear Mount Voormithadreth.
* **220 Million Years Ago:** Huge herbivorous dinosaurs evolve, as well as coelophysids. The Serpent Folk swiftly evolve from the latter thanks to Yig's influence, founding the original Kingdom of Valusia.
* **201 Million Years Ago:** Pangaea breaks up to form the northern supercontinent of Laurasia and the southern supercontinent of Gondwana. Major extinctions occur among terrestrial vertebrates and large amphibians, while the first ankylosaurian dinosaurs come into being.
* **195 Million Years Ago:** The first sauropod dinosaurs appear, as well as pterosaurs with specialized feeding. A small Serpent Folk cult to Cyäegha is founded in secret and inexplicably ignored by Yig. Like those that came before it, it collapses when the leader eventually steals enough power to become the third Vaeyen--the White Dark which is more red than Fire.
* **176 Million Years Ago:** The first member of the stegosauria group of dinosaurs comes into being.
* **160 Million Years Ago:** Around this time the pteradactyloid pterosaurs appear. The N'gah-Kthun also colonize Yuggoth and Earth, adopting Cxaxakluth worship on the former and Cthulhu worship on the latter. In both cases, they use the planetary bodies to mine dark matter. The 'Ithra try to battle them in space, but discover they have lost the gengineering techniques needed to produce the ability to solar sail with their wings. The N'gah-Kthun ultimately claim much of the northern portions of the Earth, and eventually move several key artifacts from Yuggoth to their terrestrial colonies--including the Ixaxar and the Shining Trapezohedron.
* **155 Million Years Ago:** Blood-sucking insects appear, as well as Archeopteryx and both triconodontid and symmetrodont mammals. The stegosaurians and theropods diversify. The Great Race of Yith foils a Yekub invasion attempt. Sometime thereafter, the tablets later known as the Eltdown Shards--which record this event--are buried near modern-day southern England.
* **145 Million Years Ago:** Great Cthulhu awakens during the transition from the Jurassic to the Cretaceous, triggering a minor mass extinction. The Elder Thing city which has come to house the Shining Trapezohedron by now is badly damaged during the chaos and swiftly abandoned. An Elder Thing cult to Cyäegha forms this time, and when it collapses it ends up producing two Vaeyen: the Winged Woman and the Green Moon.
* **130 Million Years Ago:** The first flowering plants appear.
* **115-106 Million Years Ago:** The first monotreme mammals appear, as well as the toothed diving bird Hesperornithes. The largest theropod dinosaur, Spinosaurus, appears.
* **100-90 Million Years Ago:** The height of the Elder Thing civilization is reached. During the Cretaceous, the supercontinents begin breaking up into their modern forms, though it still takes some time for them to assume their modern positions. India seperates from Gondwana and becomes an island continent. The icthyosaurs go extinct while the first snakes evolve, the latter being due to Yig's interference. Placental mammals likely evolve at this time.
* **80 Million Years Ago:** Australia splits from Antarctica and the first ants appear.
* **68 Million Years Ago:** Tyrannosaurus and the first triceratops appear. The Serpent Folk stumble upon the Shining Trapezohedron, now in its golden box, in the ancient ruins of an Elder Thing city.
* **66 Million Years Ago:** The dinosaurs are wiped out in the Chicxulub Impact. This catastrophe ultimately drives the Serpent Folk into the Dreamlands, guided by the Shining Trapezohedron. The supercontinent of Laurasia begins its gradual break up.
* **60 Million Years Ago:** The creodonts evolve, as well as the ancestors of modern miacids. The earliest true primates have also evolved by this time, along with owls and a diverse range of flightless birds.
* **55 Million Years Ago:** The Paleocene-Eocene Thermal Maximum occurs due to Great Cthulhu reawakening. The Flying Polyps escape during the catastrophe and take revenge on the Great Race, who send a mass migration into the Coleopterus of Earth's distant future. Many Elder Thing cities are destroyed, including their original settlement, which they replace by building the Antarctic metropolis. The island of the Indian subcontinent collides with Asia to create the Himalayas and Tibetan Plateau whilst the first whales, armadillos, and proboscidians evolve.
* **50 Million Years Ago:** Africa collides with Asia, closing the Tethys Sea. Tapirs, rhinoceroses, and camels appear in the fossil record while the primates diversify.
* **40 Million Years Ago:** Basilosaurus, one of the first giant whales, appears.
* **37 Million Years Ago:** The nimravids appear.
* **35 Million Years Ago:** Grasses appear and large grasslands begin to form. Significant extinction occurs among gastropods, reptiles, and amphibians. Many mammals such as glyptodonts, ground sloths, and canids appear, as well as hawks and eagles. Toothed and baleen whales diversify.
* **33 Million Years Ago:** Thylacinids evolve in Australia.
* **30 Million Years Ago:** The earliest pigs and cats appear.
* **28 Million Years Ago:** Paraceratherium, the largest land mammal to ever exist, appears.
* **25 Million Years Ago:** Pelagornis sandersi appears, as do deer.
* **23 Million Years Ago:** The Miocene begins. North America and South America have yet to be connected, while the Tethys Sea continues to shrink and eventually disappears as Africa collides with Europe.
* **21 Million Years Ago:** By this time, the influence of Nug and Yeb causes a sapient offshoot of *Rhinogradentia* to evolve. These beings swiftly form a Pacific civilization which eventually collapses due to an unknown catastrophe, causing the few survivors to settle on the Thera caldera.
* **20 Million Years Ago:** By now, the Thera settlement is destroyed. It meets its end when a group of lesser Old Ones rise from the ocean and attempt to subjugate the inhabitants in the hopes of using them as an unreality engine. Somehow, the settlers manage to call Great Cthulhu's wrath down on their attackers, destroying themselves in the process of laying Them low. The divine remains drift to the bottom of the caldera, yet remain untouched because any beings which could feed upon them know they bear Cthulhu's mark. All that remains of the Rhinograde civilizations are a few cyclopean ruins and engravings bearing the likenesses of men with tendrils hanging from their faces. The first giraffes, hyenas, bears, and giant anteaters appear. Birds diversify.
* **15 Million Years Ago:** Bovids and kangaroos develop, while the Australian megafauna diversify. The genus *Mammut* also appears. Around this time the split between the gibbons and the great apes develops. East Antarctica freezes over and forces the inhabitants of the declining Elder Thing city there to move underground, where the Shoggoth eventually triumphs over them once and for all.
* **10 Million Years Ago:** Insects--particularly ants and termites--diversify and the first large horses come into being. Grasslands and savannahs are established, which leads to a diversity in grassland mammals and snakes. The Serpent Folk begin a reverse migration under the guidance of the Shining Trapezohedron, moving from Kled to what will become Mhu Thulan. They use a branch of catarrhines that recently developed sapience to engineer a slave race--the initial attempts produce the Gnoph-Keh and are deemed a failure, with these abominations being driven westward into Zobna. Eventually, however, they create the Voormi. Unfortunately, the Serpent Folk settlements both on Earth and in the Dreamlands are eventually eradicated by Yig because the Serpent Folk drifted more and more toward worship of Tsathoggua.
* **6.5 Million Years Ago:** The first members of the Hominini tribe exist by this point. The Voormis gain their freedom by this point as the last survivors of the Serpent Folk either try to flee back into the Dreamlands or estivate deep underground. The Voormis create a kingdom on the surface of Mhu Thulan centered around the worship of Tsathoggua. By this time Mhu Thulan has--in no small part due to its connection to the Dreamlands--gained a bizarre and diverse ecology, including saber-tooth cats, giant ground sloths, mastodons, saurians, cloud-beasts, and other creatures.
* **6 Million Years Ago:** The *Australopithecines* diversify. About this time, the Messinian Salinity Crisis occurs. The precursor to the Strait of Gibraltar closes repeatedly for stretches of hundreds of thousands of years, causing the Mediterranean to dry out and deposit large amounts into the seabed-turned-desert each time. An unmodified race of sapient catarrhines colonize Mhu Thulan and Zobna after the supression of the Gnoph-Keh and slow decline of the Voormi, while a squat subspecies dwells to the southwest of these civilizations and worships Rhan-Tegoth.
* **5.5 Million Years Ago:** The genus *Ardipithecus* appears, while the split between homonids and chimps occurs at this time. The last major settlement of the Serpent Folk, deep underground in Yoth, is found by Yig and transfigured into bulky, dimwitted, reptilian monsters.
* **5.3 Million Years Ago:** The Zanclean Flood occurs, allowing ocean water into the Mediterranean desert for the last and current time, harrowing the end of Mhu Thulan and Zobna as the North begins to cool. As the North starts to freeze the shaggy Gnoph-Keh overrun the frigid lands and ultimately drive the Zobnarians south into Lomar. Aphoom Zhah mistakenly assumes that Tsathoggua will not exert the effort needed to pierce the glacial ice, and declares Itself openly to try and convert Mhu Thulan's waning civilization into an unreality engine. Like Rlim Shaikorth before It, It does not survive this mistake. The final remnants of the Boreal 'Ithra utilize a similar tactic their Antarctic kin to escape the cold and, in the absence of the Shoggoth, degrade into non-sapient, highly durable monsters infesting a vast honeycomb of caverns covered in reliefs they no longer understand.
* **5 Million Years Ago:** The first tree sloths and hippopatami appear. Grazing herbivores such as zebra and elephants diversify, along with predators such as lions and canids. Rodents, kangaroo, birds, and small carnivores also diversify while vultures increase in size. The number of perissodactyl mammals decreases and nimravids go extinct.
* **4.8 Million Years Ago:** Mammoths appear.
* **4 Million Years Ago:** *Stupendemys*, the largest known freshwater turtle, appears. *Australopithecus* comes into being and the first modern elephants, giraffes, zebras, lions, rhinoceroses, and gazelle appear.
* **3 Million Years Ago:** The isthmus of Panama joins the Americas and the Great American Interchange occurs, allowing a number of freshwater and land-based fauna to migrate between North and South America. These include armadillos, opossums, hummingbirds, and vampire bats migrating to North America whilst horses, tapirs, saber-tooth cats, and deer enter South America.
* **2.8 Million Years Ago:** *Homo habilus* appears and masters sophisticated stone tools, beginning the Lower Paleolithic. Close to this time *Paranthropus* appears.
* **2.5 Million Years Ago:** The first *Smilodon* appear. By this time, the most recent Ice Age begins.
* **2 Million Years Ago:** Conifers diversify at high altitudes and the aurochs evolve.
* **1.8 Million Years Ago:** The first of the species to fall under the *Homo erectus* blanket*--H. georgicus*--appears.
* **1.5 Million Years Ago:** Another branch of *H. erectus*--*H. ergaster*--masters the use of fire.
* **1.2 Million Years Ago:** The evolution of dark skin, resulting from the loss of body hair among the homonids, is complete by this time. *Homo antecessor* comes into being while the last members of *Paranthropus* die out.
* **700 Thousand Years Ago:** The most recent reversal of the Earth's magnetic field occurs. A branch of *H. erectus* by the name of *Homo pekinensis* arrives in Asia. It's likely that Great Cthulhu uses homonids to create the ancestors of the Deep Ones by this point. A species of Ghooric parasites attempts to invade and utilize homonids as hosts, but the Yuggya end up corraling them on Australia because they both compete for the same ecological niche, and these parasites end up favoring *Thylacoleo* as their hosts.
* **350 Thousand Years Ago:** The first Neanderthals appear.
* **200 Thousand Years Ago:** The first known *Homo sapiens* appear in what later becomes Ethiopia. By this time the Pacific islands are inhabited by the maritime hominid civilization of Haiei'ei, which has been cultivated by the Yuggya and the Deep Ones. It is around this time that members of *H. erectus* begin colonizing the coasts of Africa, India, and the Isle of Madagascar, founding the ancient civilization which would later be referred to as Lemuria. They soon enter into conflict with a small band of surviving Serpent Folk, and ultimately steal the Shining Trapezohedron from them. A splinter of them migrate to Thera under the guidance of the Crawling Chaos and found a colony there, which they dub Caiphul. After many years this kingdom begins to decline and ultimately forms an alliance with the Deep Ones out of desperation, leading to plentiful fish, wealth, and immortality for a select few. As the City of the Golden Gates revives above, the Deep Ones and their allies watch over the unreality in the caldera.
* **180 Thousand Years Ago:** A Shoggoth consults the Shining Trapezohedron, gaining a detailed vision of how to ascend to Godhood by the Crawling Chaos, which leads to Them stealing the payload of unreality in Thera's caldera and being transfigured into Nyogtha. The Atlantean Event causes Thera to erupt, boiling the nearby Deep Ones and Shoggoth alive before ultimately destroying Caiphul itself. In Haiei'ei, a race of alien beings from another layer of the Ghooric Zone attempt to invade so they can escape their dying world--an attempt that is thwarted when the lloigornos Vorvadoss uses these invaders as an unluck sink, destroying them.
* **173,148 Years Ago:** According to von Junzt, the Year of the Red Moon occurs in the Muvian calendar. The High Priest of Shub-Niggurath--T'yog--devises an enchantment to nullify Ghatanothoa's petrifying presence. When T'yog's attempt to confront Ghatanothoa is doomed by sabotage, the Cult of Ghatanothoa gains much greater ascendency in the province of K'naa. T'yog's failure also causes unrest and renewed religious fervor in the surrounding provinces, which Zoth-Ommog takes advantage of to found Its own among the ei'ei. By this time, Nyogtha has wended Its way to the coastal cities of "Lemuria" and uses their inhabitants to attempt to engineer a servitor race. Nyogtha's experiments focus on devising a transferable disease that transfigures homonids to Its favored specifications--leading to each city, one by one, getting overrun with uniquely terrible proto-ghouls.
* **170 Thousand Years Ago:** The Year of the Whispering Shadow occurs in the Muvian calendar--which von Junzt later dubs the "Ouranocaust," in reference to how the Muvian calendar ended. A brilliant and heretical Muvian priest by the name of Zanthu secretly devises the calculations for apotheosis, etching the mythic *Zanthu Tablets* with this information. Zanthu uses this knowledge and his natural charisma to found the eschatalogical Cult of Ythogtha and uses the cooperation of his fanatics to bring his design to fruition. Unfortunately, the prevalence of praxiometry on Haiei'ei insures that rather than producing a single Lloigor, the Muvian Event creates a host of lloigornos. Zoth-Ommog uses Its cult to siphon power from the Event, alongside other lloigornos prominent in Haiei'ei. In the end, the fledgeling divinities birthed by the catastrophe include Ythogtha, Ithaqua, Ub-bg'zth, Quachil Uttaus, and the beings which would later be known as Father Dagon and Mother Hydra.