Ghost Walk

Cooldown 3 - If you control Grohk as you cast
this spell, exile it with 3 cooldown counters
when it resolves. At the beginning of each upkeep,
remove a counter. When the last one is removed,
return this card to your hand.
Target creature gains Shroud, Haste, and
Unblockable until end of turn.
Aaaaaaaaaah!