Celestial is a faction. Its bonus is Miracle: when only 1 ally is left standing, every fallen ally rises again. It brings back every fallen unit, not only Celestial ones, once per battle. Summons, clones, Guardian Golems, Shadow Minions, Decoy Dummies, Fire Spirits, Undying Souls and Husks are not counted or revived. Units with the Self-Destruct imprint count as standing but are not revived.
Who gets it- All fallen units
Bonus by tier
Distinct member classes on the field
2 classes- Revive with 20% HP
3 classes- Revive with 40% HP
Buy the Celestial upgrade for 120 Originite. It needs the Undead upgrade and Lost Ruins cleared on Easy. 
