Nyx Prime

At the beginning of combat on your turn, gain
control of target creature until end of turn.
Untap that creature. It gains haste until end of
turn.
{1}, discard a card: Creatures you control but
don't own get +1/+1 until end of turn. If this is
the third time this ability has resolved this turn,
each of those creatures gains menace until end of
turn and don't untap during their controller's
next untap step.