Earth Kingdom Jailer is a uncommon Creature — Human Soldier Ally card from Avatar: The Last Airbender (TLA), collector number 16. Current market price: $0.12 (foil $0.27), TCGplayer market prices via Scryfall.
When this creature enters, exile up to one target artifact, creature, or enchantment an opponent controls with mana value 3 or greater until this creature leaves the battlefield.