Damnation gives black decks a four-mana way to destroy every creature and prevent regeneration from saving them. It is useful when opponents have developed several threats and answering each one individually would consume too many cards. Control and graveyard strategies can use the reset to regain time or prepare a stronger follow-up board.
The effect is symmetrical, so consider what your own creatures have already contributed. Eternal Witness or another creature with an entry ability may have delivered value before being swept away. A deck with Reanimate or Animate Dead can later recover a useful creature from the newly stocked graveyards, turning the reset into the start of its next plan.
Death-trigger strategies can also benefit even when their creatures are destroyed. Blood Artist and similar payoffs can trigger from creatures dying together, while an opposing army is removed at the same time. If preserving your own creatures matters more, effects that grant indestructible can let them survive the destruction, although that usually requires additional mana or another color.
Damnation does not exile creatures, stop their dies triggers, or destroy indestructible creatures. Toxic Deluge offers a different approach through toughness reduction, while Farewell can address graveyards and other permanent types in decks that have white. Keep cheaper targeted removal for the turns when only one threat needs attention. Damnation is most effective when the exchange removes more opposing development than your own and you have a realistic way to use the cleared battlefield afterward.
