Ba Sing Se is a rare Land card from Avatar: The Last Airbender (TLA), collector number 266. Current market price: $5.76 (foil $5.93), TCGplayer market prices via Scryfall.
This land enters tapped unless you control a basic land. {T}: Add {G}. {2}{G}, {T}: Earthbend 2. Activate only as a sorcery. (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.)