Cross Summoner: R

After the final defeat of the Black Iron Mage, all the realms settled into a brief, fragile peace. Beneath it, a group of humans had quietly turned their ambitions toward immortality, exploring a taboo form of magic that deepened the chaos across every realm as their understanding of it grew. Creatures that should not exist began pouring into the world. The Heavenly Realm, the Hellish Realm — none remained untouched. Someone is responsible for this. Whether immortality is truly the goal, or whether something deeper and darker has been pulling the strings from the beginning, is still unclear.