Earthen Ally is a rare Creature — Human Soldier Ally card from Avatar: The Last Airbender Promos (PTLA), collector number 177s. Current market price: — (foil $1.63), TCGplayer market prices via Scryfall.
This creature gets +1/+0 for each color among Allies you control. {2}{W}{U}{B}{R}{G}: Earthbend 5. (Target land you control becomes a 0/0 creature with haste that's still a land. Put five +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)