Davy Jones, Devil of the Seas

Hexproof, Indestructible
Whenever Davy Jones enters the battlefield,
create a legendary artifact token named "Dead
Man's Chest" with: "Whenever this artifact leaves
the battlefield, sacrifice Davy Jones."
Whenever a creature an opponent controls dies,
return that creature to the battlefield under your
control, except it's a 1/1 black Merfolk.
Whenever Davy Jones leaves the battlefield, exile
each creature you control, then return them to the battlefield under their owner's control.