Earth Rumble is a uncommon Sorcery card from Avatar: The Last Airbender (TLA), collector number 174. Current market price: $0.16 (foil $0.27), TCGplayer market prices via Scryfall.
Earthbend 2. When you do, up to one target creature you control fights target creature an opponent controls. (To earthbend 2, target land you control becomes a 0/0 creature with haste that's still a land. Put two +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped. Creatures that fight each deal damage equal to their power to the other.)