Kamen Rider Musou: Armored World Heroes

Years has passed since the defeat of Uchiha Madara and the eradication of Witches, Nightmares, and the Incubators. But now a new threat has emerged in the form of Helheim that is slowly starting to consume the world, starting with Zawame City. Due to the other riders fighting each other for supremacy, it's now up to a group of Shinobi and former Puella Magi to end the invasion.