Drove, Titan of Decaying Feast

When Drove enters the battlefield, sacrifice it unless
it escaped.
Whenever Drove enters the battlefield or attacks,
choose target creature. When that creature dies this
turn, search your library for a creature card with
lesser mana value, put it onto the battlefield tapped,
then shuffle.

Escape—{b}{b}{g}{g}, Exile five other cards from
your graveyard. (You may cast this card from your graveyard for its escape cost.)