Hive Shadowstalker

First Strike
Hive Ambush{b}{b} (If a Xenomorph creature you control is unblocked, you may pay {b}{b} : Put this
card onto the battlefield from your hand tapped and
attacking. Return this card to your hand at the
end of your combat phase.)
When Hive Shadowstalker deals combat damage
to a player, destroy X token creatures that player controls, where X is Hive Shadowstalker's power.