Kaymai, Keeper of the Soul

Deathtouch, Lifelink
When Kaymai, Keeper of the Soul enters the battlefield, all nonblack creatures get -5/-5 until
end of turn.
Whenever Kaymai, Keeper of the Soul attacks a creature, it deals X damage to that creature's controller, where X is the power of
Kaymai, Keeper of the Soul.
{x}: Each opponent loses X life and you gain X life.
Come forth, good sir, for the abyss awaits.