Theater of Horrors
From Duskmourn: House of Horror Commander set
Theater of Horrors
Enchantment
At the beginning of your upkeep, exile the top card of your library.
During your turn, if an opponent lost life this turn, you may play lands and cast spells from among cards exiled with this enchantment.
: This enchantment deals 1 damage to target opponent or planeswalker.