Boseiju, Who Endures is a rare Legendary Land card from Kamigawa: Neon Dynasty Promos (PNEO), collector number 266p. Current market price: $55.16 (foil $55.47), TCGplayer market prices via Scryfall.
{T}: Add {G}. Channel — {1}{G}, Discard this card: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs {1} less to activate for each legendary creature you control.