Hei Bai, Spirit of Balance [Avatar: The Last Airbender]

Cost: 2 W/B W/B Whenever Hei Bai enters or attacks, you may sacrifice another creature or artifact. If you do, put two 1/ 1 counters on Hei Bai.
When Hei Bai leaves the battlefield, put its counters on target creature you control. "My friend gave me hope that the forest would grow back." —Aang