Hei Bai, Spirit of Balance (TLA 225)

Legendary Creature — Bear Spirit • Mana cost: {2}{W/B}{W/B} • Avatar: The Last Airbender • Uncommon

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

Illustrated by Tyler Smith.