Let's say you're right.>Frozen Touch
Frostbrand weapon to get cold immunity.>Burning Eyes.
Firebrand weapon, same deal.>Body Tripple.
Quarterstaff of Alacrity. I'm fast, can hit hard, am hard to hit and don't care about your alt-self's appearance.>Black Blood.
Brilliant Energy might do it, but honestly I'd just fix this with a lightsaber so your wounds cauterize and can't bleed at me.>Electric Soul.
There's a lot of things I could do here but if you've been an okay dude before this I'd probably grab a portal gun and be sporting about it.>Liquid Heart
Frostmourne Hungers.>Demonic Vision
Your ten normies are going to deal with any of the above about as well as the folks with supernatural powers.
Not saying the weapon is invincible, but until the patchnotes come out I can take most of y'all, so there's no need for me to be the one to strike first.