Boseiju, Who Endures (PPNEO-266) - Kamigawa: Neon Dynasty Promos

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Channel — {1}, 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.