Heidi and Friede face off in a final battle to determine the fate of the world. On a livestream to the world via the Iono Zone, Heidi and Friede fight at the top of the Ruined Kingdom clocktower and battle. Heidi becomes victorious and kills the World Cleanser once and for all, saving the world. Heidi then announces that she will take the role of Acting-Arceus of the world until she can find a way for the world to continue without an Arceus at all.
Heidi buries Friede's Legend Plate and Greatsword in honor, then buries Izanami's Legend Plate right next to it.