Ephrava, The Null Queen

Whenever a creature would enter the battlefield
from a graveyard under an opponents control,
you may pay life equal to its converted mana cost.
If you do, it enters the battlefield under your
control as a black zombie in addition to its other
colors and types.
{3}{b}{b}{b}: Return target creature card in a
graveyard to the battlefield under its owner's
control. Put a lifelink counter on it.