Liliana, Demon's Thrall

Whenever a Zombie you control deals combat
damage to an opponent, each player puts the top
two cards of their library into their graveyard.
{1}{u}{b}{r}: Exile target creature from a graveyard. Create a token that's a copy of that creature,
except it's a 4/4 Black Zombie in addition to
other colors and types. Put a lifelink counter on
it, then you lose life equal to the exiled creature's converted mana cost.