Merc of Power

Intimidate
Put a -1/-1 counter on a creature you control:
Put a +1/+1 counter on Merc of Power, gain control of it until end of turn, untap it, and it gains haste. Until end of turn, it can't attack it's previous controller. Activate this ability only as a sorcery.
{t}: Merc of Power deals 1 damage to target creature for each +1/+1 counter on it.