Arin of Rage

+1: Target creature you control gains Haste and +1/+0 until end of turn.
0: Arin of Rage becomes a 3/3 Red Legendary Human Warrior creature with First Strike until your next turn. It is still a Planeswalker.
-7: All creatures you control have Double Strike and "Sacrifice another creature you control: This creature gains +3/+0" until your next turn.