Spiteful Quest

Enchant creature.
When enchanted creature attacks, put a +1/+1 counter on it and it gains flying until end of turn. Then, if it has 3 or more +1/+1 counters on it, sacrifice enchanted creature at end of combat and it deals damage equal to it's power divided as it's controller chooses among up to three target creatures.
Vengeance, at any cost.