Gruul Horn

When Gruul Horn enters the battlefield, Equip it to target creature you control with a +1/+1 counter on it.
Whenever Equipped creature has a +1/+1 counter put onto it, you may exile the top card of your deck. if you it is a creature with Rupture, you may cast it for its Rupture cost and remove all +1/+1 counters from Equipped creature to help pay the Rupture cost.
Equipped creature has +3/+0 and Haste.
Equip {3}