After Yugi and Yami Yugi make an internal compromise to each other and vow to work together as a team, Yugi starts to make a comeback against Mai, taking control of her Harpie's Pet Dragon and using his own Catapult Turtle to fire it at her Mirror Wall. Mai multiplies her Harpie Lady and revives Harpie's Pet Dragon, which gets a power boost for every Harpie Lady in play. Yugi manages to summon the Black Luster Soldier and defeats Mai from within their duel via Mai surrendering, sending Yugi straight to the finals of the Duelist Kingdom tournament.