The Book of Cosmos is a community made book conceptualized primarily by Quinn and Strelizia. Its theme is around mystical space and technological aspects, identifiable through the Drone, MACAIR spells, paired with spells like Wormhole, Supernova, and Blackhole. The art for this book was done by DamselOfDistress#9231 and Strelizia#0416. The book was added into the game through the October 9, 2022 patch, at the same time as the Book of Wilds.
Spells[]
| Icon | Spell | Tier | Type | Number of Charges | Initial Charge Time/Recharge | Maximum Damage | Description |
|---|---|---|---|---|---|---|---|
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Collision Course | 1 | Ball | 4 | 0/5 | 120 | Throw a ball of magical stardust that sticks to anything that it hits. The initial hit drops one projectile of starfire on the opponent, along with one more starfire projectile each turn for the next 2 turns. |
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Shooting Stars | 2 | Targeted | Infinite | 3/5 | 240 | Shoots an increasing number of starfire projectiles on this turn and for the next 2 turns. |
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Gravity Pulse | 1 | Ball | Infinite | 0/1 | 30 | Applies gravity for 3 turns. Explosion pulls in rather than out. |
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Dark Matter Bomb | 2 | Bomb | 2 | 3/1 | 160 | Applies gravity for 2 turns to any unit that is hit by this bomb. An additional bomb is created near the initial explosion at the beginning of your next turn. |
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Wormhole | 1 | Arena | Infinite | 1/5 | N/A | One way portal to anywhere. Any size unit can go through it, but spells can not. Permanent until recast. Going through the wormhole will apply gravity until the start of your next turn. Shares a cooldown with Arcane Portal. |
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Abduction | 2 | Bolt | Infinite | 3/5 | N/A | Makes the target float in a beam of light for a short time and pulls them slowly towards the caster, then drops them. Lasts twice as long and reaches 50% further if the caster is in a MACAIR. This spell does not end your turn. |
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Fusion | 1 | Personal | Infinite | 0/5 | 30 heal | At the start of each turn, for as long as Fusion persists, you heal an additional 10 hp. Fusion is broken by taking damage or casting a spell. Minions can still cast spells without breaking Fusion. Ends automatically after 5 turns if it hasn't been interrupted. |
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MACAIR | 2 | Tower | 4 | 0/5 | 50 hp | Hovers in mid-air. Can move left, right, up and down. |
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Summon Drone | 1 | Soulbound Minion | Infinite | 0/5 | N/A | Small extraterrestrial being which can cast Star Bolt (and Drone Strike with level 5 cosmos familiar). |
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Cosmic Horror | 2 | Soulbound Minion | Infinite | 3/5 | N/A | Can cast Tentacle Smash by default, and Abduction, Gravity Pulse, and Dark Matter Bomb if they are in your spellbook. This unit cannot be affected by gravity under any circumstances. |
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Black Hole | 3 | Targeted | Infinite | 5/5 | N/A | Stays until moved or the caster is destroyed. Pulls spells and units alike into its center. Units that fall into the center have Gravity applied for the rest of their turn and are teleported out of a random Wormhole or sunk if one does not exist. Spells and towers are destroyed. |
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Supernova | 3 | Targeted | 1 | 5/- | 3600 | Over the next 5 turns, the supernova spews out waves of starfire in every direction outwards. Increases in intensity over the course of its lifetime. |
Familiar[]
The Cosmos familiar is Gravitation aka the UFO. As with other familiars, you use it by paying 20 health points per level, which you can do up to 5 times. At level 1, you learn the spell: Gravity Well. At level 5, Drone gains the spell: Drone Strike. Every time you power your familiar, you weigh slightly more, making you more resistant to knockback. Additionally, the digging capabilities of Collision Course and Shooting Stars are increased, while Supernova's damage potential is also increased. Finally, the effects of the Gravity debuff are lessened when applied to the user with the Gravitation familiar.
Familiar specific changes:
- Level 1: Learn the spell Gravity Well.
- Level 5: Drone learns the spell Drone Strike.
Icon Spell Tier Type Number of Charges Initial Charge Time/Recharge Maximum Damage Spell Description 
Gravity Well 1 Ball Infinite -/5 50 Applies the unique gravity well debuff for the next 5 turns on any affected units, which pulls in projectiles in the surrounding area. Its explosion pulls in rather than out.
Minions[]
| Icon | Minion | Health | Spells | Number of Charges | Initial Charge Time/Recharge | Maximum Damage | Spell Description |
|---|---|---|---|---|---|---|---|
|
Drone | 40 |  |
Infinite | 0/0 | 2x25 | Shoots two independently aimed, perfectly accurate shots. |
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Infinite | 0/0 | 15 | A weak, short ranged bolt of energy that destroys no terrain and has zero knockback. This spell does not end your turn. | |||
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Cosmic Horror | 75 | Tentacle Smash  |
Infinite | 0/0 | 30 | A melee attack with a small radius. |
| Abduction |
Infinite | 3/5 | N/A | Makes the target float in a beam of light for a short time and pulls them slowly towards the caster, then drops them. Lasts twice as long and reaches 50% further if the caster is in a MACAIR. This spell does not end your turn. | |||
| Dark Matter Bomb |
2 | 3/- | 160 | Applies gravity for 2 turns to any unit that is hit by this bomb. An additional bomb is created near the initial explosion at the beginning of your next turn. |
[]
| Arcanists | |||||
|---|---|---|---|---|---|
| Main Page | Patch Notes | ||||
| Spell Info | |||||
| Spells | Familiars | ||||
| Zombie Minions | Advanced Topics | ||||
| Spell Books | |||||
| Arcane | Flame | Stone | Storm | Frost | Underdark |
| Overlight | Nature | Seas | Cogs | Holiday | Illusion |
| Blood | Druidism | Cosmos | |||
| Features | |||||
| Game Modes | Rating | ||||
| Prestige and Achievements | Maps | ||||
| Outfits | Arcane Monster | ||||
| Events | |||||
| Tournaments | Special Events | ||||