Rumble Arena is a common Land card from Avatar: The Last Airbender (TLA), collector number 277. Current market price: $0.23 (foil $0.31), TCGplayer market prices via Scryfall.
Vigilance When this land enters, scry 1. (Look at the top card of your library. You may put it on the bottom.) {T}: Add {C}. {1}, {T}: Add one mana of any color.