Lyrithra, Whisper of the Abyss

When Lyrithra enters the battlefield, you become
the monarch.

{t}, Sacrifice a creature: Put target creature from your graveyard onto the battlefield under your control, you lose life equal to its mana cost. It's a black Skeleton with base power and toughness 3/3.

{b}{b}: Target creature you control gains Wither until end of turn.