Usalia, Wererabbit Overlord

Overlord
When Usalia, Wererabbit Overlord enters the battlefield, put a 0/7 Green Prinny Token. Whenever another creature you control takes damage, put a rage counter on Usalia, Wererabbit Overlord. Remove three Rage Counters from Usalia, Wererabbit Overlord and it gains +5/+5 until end of turn and must attack this turn if able.