What are the abilities of Roiling Horror?
user
Roiling Horror's power and toughness are each equal to your life total minus the life total of an opponent with the most life.\nSuspend X—{X}{B}{B}{B}. X can't be 0. (Rather than cast this card from your hand, you may pay {X}{B}{B}{B} and exile it with X time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)\nWhenever a time counter is removed from Roiling Horror while it's exiled, target player loses 1 life and you gain 1 life.
assistant