Xenomorphic Invader

Whenever Xenomorphic Invader deals
combat damage to a player, you may search your library for an enchantment with converted mana
cost 3 or less and put it into your hand. Then
shuffle your library.
Whenever you cast an enchantment spell, you
may put a +1/+1 counter on Xenomorphic
Invader and a -1/-1 on target creature.