Garvold, Reining Warlord

Garvold, Reining Warlord enters the battlefield
with Key count of 1. (Whenever this creature deals
combat damage to an opponent, up the Key count by
1.)
Key 1•Create three 1/1 blue Warrior creature
tokens.
Key 2•Gain 5 life.
Key 3-5•Gain control of target creature you
don't control.
Key 6{bull}Exile Garvold until end of turn.