Coelacanth

At the beginning of your end step, you may exile a creature card from your graveyard. If you do, Coelacanth gains hexproof until your next end step.

When Coelacanth dies, you may exile it. If you do,
return all other creature card exiled with Coelacanth
to the battlefield under your control.

This thing's never coming back, right?