Air lion turtle

The Airbending Lion Turtle possessed the ability to bestow airbending unto people.

History
Wan was wondering in the spirit wilds until he spotted some airbenders. The benders ran away and Wan followed them. It led him to the airbending lion turtle, on his back was a tribe of airbenders with inhabiting spirits. Vaatu arrived and turned all the spirits into dark spirits. Vatu and Raava arrived and led the spirits and Vaatu away. The lion turtle granted Wan airbending but Raava must hold on to the power.

Thounsand of Years later the lion turtle was killed when they were hunted till extinction.