Egon, Timeless Eater

Flying, first strike
{u/b}{u/b}: Exile Egon, Timeless Eater. Return it to
the battlefield under your control at the
beginning of the end step.
At the beginning of each upkeep, put a +1/+1
counter on Egon, Timeless Eater for each
creature that left the battlefield last turn.
It consumes entire timelines