I'd be of an unknown ancient race, from before the Dawn Era, a ruthless egocentric evil Lord of Destruction, living in a massive castle bigger than the entirety of Solitude, and my castle would be surrounded in a constant, unending thunderstorm.
I'd wield a Godslayer Greataxe made of void darkness capable of splitting reality and kill gods as the name suggests, anyone else would be unable to wield it as it would be like trying to wield air for them.
Wearing armor would be uneccessary as i would be immortal, regenerate from a single quark, and respawn in random points of the universe if completely erased, in truth i'd exist everywhere and my physical form would be merely an avatar.
I would also be capable of teletransportation as well as casting the most legendary of spells, weave fire hurricanes, bend time, control minds, create and corrupt life.
And i'd command a gigantic army of augmented vampires, augmented werewolves, augmented giants and augmented dragons, overtaking the whole Mundus, Oblivion and Aetherius in my name: The Ultimate Supreme Absolute Omni-God Thalles.
(Persona partially based on Morgoth/Melkor from Tolkien's stories)