Champion

Champion is a keyword ability that represents two triggered abilities. "Champion an [object]" means "When this permanent comes into play, sacrifice it unless you remove another [object] you control from the game" and "When this permanent leaves play, return the removed card to play under its owner's control." See rule 502.72, "Champion." A permanent is "championed" by another permanent if the latter removes the former from the game as the direct result of a champion ability.