Through Brimstone and Fire

Ainz Ooal Gown has finally made his presence public. The Sorcerer's Kingdom made it's debut at the Battle of Katze plains and made it's first gains with the city of Re-Estize under their yoke. However, a new force arrives and surely not from YGGDRASIL, for this new group arrived from another DMMO, one where the practice of Magic is but an afterthought. What response will Ainz give?