Boseiju, Who Endures

{t}: Add {g}.

Channel—{1}{g}, Discard Boseiju, Who Endures: 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.