Haru, Hidden Talent (TLA)

Legendary Creature — Human Peasant Ally

Whenever another Ally you control enters, earthbend 1. (Target land you control becomes a 0/0 creature with haste that's still a land. Put a +1/+1 counter on it. When it dies or is exiled, return it to the battlefield tapped.)

Niche lord for Ally strategies in Commander and Pioneer, but the earthbend mechanic is slow and requires a critical mass of Ally triggers to generate meaningful value. Works best in dedicated Ally decks where you're already running multiple enters-the-battlefield effects, but the payoff is modest compared to more efficient creature lords or mana sinks.

Avatar: The Last Airbender — Uncommon