Nigthhunting Wolfpack

First Strike
Whenever Nigthhunting Wolfpack deals combat
damage to a player, you may exile a creature from
that players graveyard and pay {2}{g}. If you do,
put X +1/+1 counters on this creature, where X
is that creatures converted mana cost.
Nightbeast (As long as it is night this creature is indestructible and can't be blocked)