Book of Dyzan

**the book oF dzyAn**

*Text, artifiact*

Identify reveals: This work is an ancient text from a far-away land, which contains “unwelcome truths”: cosmic revelations inimical to any humanoid mind, which the Book tries to reconcile. As such, it describes accounts of mental and physical rites which are protective to mortals. It also contains ancient spells and formulas, spell adjacent rituals, many not seen or uttered on the material plane for millennia.

***Formulas.*** This book contains the following 2 formulas: *protective aura* and *secret mouth*. You get a +2 bonus on ability checks made to cast these spells as formulas while attuned to this text (using the formulas in this book is similar to using a spell scroll except the scroll is not destroyed and the DC of casting it as a formula and skill check is listed with the spell, however you can only make the check once per long rest and a failure has side effects, see formula notes). Casting as a ritual requires no check if you are attuned to the book, just the requisite time and material components.

**protective aura** *4th-level abjuration (formula)*

**Casting Time:** 1 minute

**Range:** Self (5-foot-radius circle)

**Components:** V, S, D (circle centered on you)

(immediately before casting another spell)

**Formula Ability Checks:** DC 19 Intelligence (Arcana) or Wisdom DC 19

**Formula Backlash:** 4d4 psychic damage

**Formula Failure:** One level of exhaustion

**Duration:** Until you finish casting another spell (so the casting time of that other spell essentially)

You siphon magical energy from another spell to shield yourself from danger. To do so, you must remain within the diagram and begin casting another spell before the end of your next turn after you finish casting this spell. Once you begin casting another spell, you gain resistance to bludgeoning, piercing, and slashing damage from nonmagical attacks and protection from extraplanar creatures while you continue casting the new spell. The protection from this spell means that all attack rolls upon creatures in the area by aberrations, celestials, elementals, fey, fiends, and undead are made with disadvantage. Creatures in the area can’t be charmed, frightened, or possessed by such creatures while you continue casting the new spell. Aberrations, celestials, elementals, fey, fiends, and undead can’t enter the spell’s area unless they succeed on a Charisma saving throw. If the saving throw fails, it can’t be attempted again and the creature’s movement ends.

**Secret mouth**

*2nd-level transmutation (formula)*

**Casting Time:** 1 hour (can only cast as a formula cast as a formula)

**Range:** Touch

**Components:** V, S, M (rare herbs and oils worth 250 gp, which the spell consumes if cast in lasting mode)

**Formula Ability Checks:**  DC 15, Intelligence with alchemist’s supplies or Wisdom (Medicine) DC 15

**Formula Backlash:** One level of exhaustion

**Formula Failure:** Target is reduced to 0 hit points and begins dying

**Duration:** 8 hours (for temporary) or instantaneous (for lasting) see notes below

With this Tcho-Tcho technique, you cause an extra mouth to grow somewhere on the body of a willing or immobilized creature that you perform surgery upon during the casting time. Commonly, this mouth grows on the palm of one hand, but its location is up to you. The *secret mouth* can speak, breathe, and eat. It is fanged, and thus able

to inflict significant damage. The target can make an unarmed strike using the appropriate limb to bite. When it does, the unarmed strike deals 1d4 piercing damage and has the light and finesse properties. The bite is not innately venomous, but a Tcho-Tcho Okkator is able to hollow out the fangs of the *secret mouth* and place poison within them and others can use the spell *venomous fangs* to permanently add a venom gland.

You can cast this spell in one of two modes: temporary or lasting.

***Temporary.*** When you cast this spell in temporary mode, it lasts 8 hours. When cast this way, the spell doesn’t consume the material components.

***Lasting.*** When you cast this spell in lasting mode, it is instantaneous, leaving the creature’s body indefinitely modified thereafter. When cast this way, the spell consumes the material components.

*Remove curse*, *restoration*, or similar magic can remove the *secret mouth* if the target is willing to have it removed.

Beyond the above formulas there are many spells contained within the pages of this ancient text Each of these spells takes 8 hours of study to learn and requires a DC 22 arcana check while simultaneously being attuned to the book. On a failure you take 10d6 psychic damage. On a success a spell is learned and it is added to your spells known list provided you have a spell slot of the appropriate level. You can cast these spells as rituals once learned as long as you have either the ritual spell casting feature or are attuned to the book. Ritual spells can be learned even if you do not have a spell slot of the appropriate level but still require attunement to this book or the ritual spell casting feature to cast.

**Other Spells in the books:**

1.      Impossible Arithmetic 3rd level (ritual)

2.      Semblance of dread --cantrip

3.      Ectoplasm 2nd level

4.      Emanation of Yoth 4th level (ritual)

5.      Green Decay 4th level (ritual)

6.      Yellow Sign 4th level

7.      Eldritch Communion 5th level (ritual)

8.      Animate Dead (look up spell)3rd level

9.      Speak with Dead (look up spell)3rd level

10.   Create Undead (look up spell) 6th level

11.   Arcane Gate (look up spell) 6ht level

12.   Harm (look up spell) 6ht level

13.   Astral Projection (look up spell) 9th level

14.   Protection from the Void 1st level

**Further Benefits of The Book:**

It takes 30 days of concentrated study—at least 8 hours per day while attuned to the book—to attempt to understand this book more deeply. After completing this study, you must make a DC 25 Intelligence (Arcana) check. If this check fails, you take **16d10** psychic damage, and you can attempt the check again after another 30 days of concentrated study.

When you succeed on the check, you gain the following benefits:

·       Your Intelligence score increases by 2. Once you gain this benefit, you can’t use this book to increase your Intelligence again.

·       You gain advantage on saving throws against spells and other magical effects.

You learn how to, as an action, sacrifice hit dice to turn into a demon. 3 hit dice you can turn into a type 3 demon for 1 hour (glabrezu CR 9 or  yochlol CR 10). You loose your class features but retain your INT,  WIS, CHA stats, saving throw proficiencies, skill, tool, and language proficiencies and alignment. If you drop to 0 HP in this form you revert to your normal form. You gain the benefits of a short rest after coming out of this form.

·       After performing a ritual for 10 minutes you can open a a gate to one of the lower planes. Only you can use this gate. It remains open until you return through it. This functions as the 9th level gate spell in all other ways.

Sample Spell in the book:

**impoSSibLe arithmetic**

*3rd-level divination (ritual)*

**Casting Time:** 1 action

**Range:** Self

**Components:** V, S, M (an offering to the Great Old Ones, which the spell consumes; see text) **Duration:** Instantaneous

You gain a glimpse of a terrible truth, receiving one truthful answer regarding the entity/entities you know face. The material component is an offering to the Great Old Ones. It is up to the GM to decide if the offering is acceptable. Rarer or more obscure information requires more exotic offerings: for example, a silver holy symbol of a Great Old One would be appropri- ate to learn a vague clue about the components required to cast a minor formula or to learn one fact about a minor Mythos monster. A *spell scroll* of an uncommon spell of 2nd level would be suitable to learn about the goals, methods, or origins of a challenge rating 5 to 10 creature. A rare wand or one or more alchemical curiosities worth at least 1,000 gp would be suitable to learn about a challenge rating 11 monster or understand how to perform

a formula without detailed instructions. An especially impressive rare magic item or occult art object worth 5,000 gp would be a suitable offering to learn the likely weaknesses of a challenge rating 17 monster or deduce what Great Old One a secretive cult is about to awaken based on vague clues, as well as some vague hints about how to stop them.

**Protection from the Void**

1st level abjuration

**Casting Time:** 1 action

**Range:** Self

**Components:** V, S, M (a small bar of silver worth 15 gp which the spell consumes)

Duration: Concentration up to 10 minutes

Until the spell ends, one willing creature you touch has resistance to psychic damage and has advantage on saving throws made to resist Void based spells and is immune to the madness inducing and physical/mental warping effects.