Flinarr Benarth, Seafoam Lord

Vigilance, indestructible
{w/u},{t}: Exile the top card from your library, and put a card from exile that was not put there this turn onto the battlefield under your control. Put a wave counter on it that does, "When this creature would die, put it in your hand instead."
Whenever a creature enters the battlefield from exile or attacks, target opponent puts a non-land permanent they control from the battlefield