Fang, Roku's Companion (Extended Art) (TLE-193) [Avatar: The Last Airbender: Eternal-Legal]

Flying

Whenever Fang attacks, another target legendary creature you control gets +X/+0 until end of turn, where X is Fang's power.

When Fang dies, if he wasn't a Spirit, return this card to the battlefield under your control. He's a Spirit in addition to his other types.