Overlord Blue Citadel Alternate

What if Momonga and the Great Tomb of Nazarick didn't arrive in the New World as previously known? What if... Someone else emerged that day? Jack Graham is an ArchMirage, a powerful magic heteromorphic beast capable of altering his appearance into that of a large mount-sized draconic creature with Deep Amethyst scales. He's a World Champion and the leader of the Blue Citadel, a top PvP-RPG Heteromorphic Guild in the game of YGGDRASIL. They were known to be in control of the underground City of Vilisyrteria during the last days of the game.