Subduer Devil

Deathtouch, unleash
When Subduer Devil enters the battlefield, if it has a +1/+1 counter on it, gain control of target creature until end of turn. Untap that creature.
It gains haste and deathtouch until end of turn.
When Subduer Devil enters the battlefield, if it doesn't have a +1/+1 counter on it, it deals 1 damage to target creature.