Spatiotemporal Tunnel

The Spatiotemporal Tunnel is a Guild-related feature that can be accessed from the Guild Adventure by entering the temporal in the upper-left corner of the central island. The feature is also commonly referred to in the community as Guild Boss or Guild Bosses. It is also closely related to the Guild Miracle.
=Format=
The Spatiotemporal Tunnel represents a set of alternate maps which the player can access through the portal in the Guild Adventure map.
* By accessing the Spatiotemporal Tunnel, a pop-up opens allowing the player to access a specific chapter
* Feature resets every (TBA) days - time left before reset can also be inspected at the bottom of the pop-up mentioned above 
* Movement in the Spatiotemporal Tunnel maps do not consume Movement Points - players have unlimited movement on these maps
* Chapters must be completed in order - that is, Chapter 1 must be completed before Chapter 2 can be accessed and so on
* There is a total of 7 Chapters (from which the last one labeled "Endless Inferno" is never-ending as the name suggests)
* The main currency in the Spatiotemporal Tunnel are the Spatiotemporal Gems (used to upgrade Guild Miracle) 
=Chapter Structure=
* Every chapter consists of a map with pre-placed monsters and reward chests
* Maps are not random - upon reset, maps always are reset to the exact same layout
* Each monster represents a "boss" that the players can fight (similar to Dragon Invasion)
* Defeating bosses will reward players with one of four different artifacts (Magic Crystal, Broken Door, Spatiotemporal Key, Spatiotemporal Coordinates)
** Artifacts are always map specific - that is, artifacts collected in a map cannot be reused in the upcoming map(s)
** Note that it is possible that multiple monsters on the same map yield the same artifact. Collecting it multiple times is redundant and unnecessary.
** However, each artifact will be droppable by at least one monster on each map.
* To advance to the next chapter, all four artifacts must be obtained and then the portal must be accessed by at least one of the players
* Reward chests contain various rewards (their contents can be inspected by tapping on them on the map) and can be collected individually by each player of the guild
=Boss Fights=
* Each monster on the map (or boss) has a limited amount of HP. In order to defeat the boss, its HP must be reduced to 0.
* Players from the guild fighting the same boss contribute to reducing its HP and ultimately defeating it.
* Each player has up to 3 fights per day - doesn't matter if it's against the same boss or different bosses
** Note that just like Dragon Invasion it is not possible to cancel a fight
** It is possible to forcefully exit the game before the fight is over to preserve your attempt - damage done to the boss before cancellation is (of course) not taken into consideration
* Fighting a monster will grant players the same amount of Spatiotemporal Gems per fight regardless of how much damage they deal to the boss in that particular fight
* Damage dealt to bosses is capped at 2999.99M (before any bonuses)
==Fight missions==
While players may choose to fight the bosses with any formation they want (in order to optimize damage), the game gives the possibility of setting up specific formations in exchange for an added bonus on the final score (similar to Hotspot heroes in Dragon Invasion).
There are two types of missions (they are randomized after each battle and individual to each player):
* Easy: Deploy at least 5 units of <Specific Faction> for a +50% bonus
* Hard: Deploy at least 5 units of <Specific Faction> (out of which 1 of them must be a <Specific Unit>) for a +70% bonus 
Indeed, even though it is recommended players maximize the damage they can perform with their optimal formation instead of chasing mission bonuses, completing missions can lead to a score higher than the damage cap.
=Chapters=
==Chapter 1: Lava Inferno==
Boss	HP 	Artifact
 	500M	Magic Crystal
 	600M	Spatiotemporal Key
 	800M	-
 	700M	Broken Door
 	1B 	Spatiotemporal Coordinates
 
Not much of a choice here. Bosses block the main path so they all need to be killed to progress to Chapter 2.
==Chapter 2: Deep Blue Sea==
Boss	HP 	Artifact
 	2.25B	-
 	3B 	Spatiotemporal Key
 	3B 	Spatiotemporal Coordinates
 	3B 	Magic Crystal
 	3.75B	-
 	3.75B	-
 	4.5B 	Broken Door
 
While not all bosses are mandatory here, they are easy enough to kill in order to obtain all Reward Chests.
==Chapter 3: Sky Island==
Boss	HP 	Artifact
 	9000M	Magic Crystal
 	9000M	Magic Crystal
 	9000M	Spatiotemporal Key
 	9000M	Spatiotemporal Key
 	9000M	Broken Door
 	9000M	Broken Door
 	9000M	Spatiotemporal Coordinates
 
All reward chests on the map are immediately available.
Therefore the players should organize and focus here on killing exactly four bosses and collect all the artifacts needed to advance to the next level.
In other words, don't focus on both Red Dragon and Phoenix for example - pick only one, and ignore the other.
==Chapter 4: Abyssal Crypt==
Boss	HP 	Artifact
 	13.5B	Magic Crystal
 	13.5B	Spatiotemporal Key
 	13.5B	Broken Door
 	13.5B	Spatiotemporal Coordinates
 	18B 	Magic Crystal
 	18B 	Spatiotemporal Key
 	18B 	Broken Door
 	18B 	Spatiotemporal Coordinates
 
The map here is split into two - western is Rampart, eastern is Necropolis. From the bosses' HP, it would seem faster to kill the Rampart side.
Due to how bosses behave differently, some guilds prefer the Necropolis side + Dendroid Soldier as this yields all rewards on the map.
==Chapter 5: Subterranean Maze-Like City==
Boss	HP 	Artifact
 	30B	Magic Crystal
 	33B	Spatiotemporal Key
 	36B	Broken Door
 	42B	Broken Door
 	45B	Spatiotemporal Coordinates
 	30B	-
 	42M	-
 	33B	-
 	33B	-
There are a couple of choices here:
* Minotaur, Medusa and Evil Sorceress are all mandatory
* Harpy or Scorpicore block the path and drop the same artifact, so only one is required
* Red Dragon and Black Dragon King block the same optional chest - kill at most one of them
* Both Evil Eye and Beholder each guard a separate optional chest.
==Chapter 6: Towers in the Air==
	40B	Broken Door
	40B	Broken Door
	40B	Spatiotemporal Key
	40B	-
	45B	Magic Crystal
	45B	Magic Crystal
	50B	Spatiotemporal Coordinates
(map to be added)
This is a confusing map as it's filled with teleporters. All bosses are reachable via teleportation.
The most popular boss on the map by far is Zealot. While extremely difficult to kill, its defeat opens a path with multiple reward chests.
==Endless Inferno==
Boss	HP 	Artifact	Spatiotemporal Gems/Fight
 	40B	- 	600
 	40B	- 	700
 	40B	- 	800
 	40B	- 	900
 	∞ 	- 	1000
Bosses must be defeated in order, Devil has infinite HP. There are no reward chests here.