Agregor, Hive Recruiter

{u}{b}, Reveal Agregor, Hive Recruiter from your
hand: Put a parasite counter on target creature. Activate only during your turn.
When Agregor enters the battlefield, exile each creature your opponents control with a parasite counter on it, then return those cards to the battlefield under your control. Each creature
returned this way becomes a Xenomorph in
addition to it's other types, gets a +1/+1 counter
and has haste.