Tundra Tank is a uncommon Artifact — Vehicle card from Avatar: The Last Airbender (TLA), collector number 121. Current market price: $0.16 (foil $0.25), TCGplayer market prices via Scryfall.
Firebending 1 (Whenever this creature attacks, add {R}. This mana lasts until end of combat.) When this Vehicle enters, target creature you control gains indestructible until end of turn. Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)