Legendary Black Dragon Ring can't be equipped by Warriors

I'm guessing it's like how Kataras say they're thief only but can only be equiped by Dual Blades, or Magic Arrows, Archers, and Mercs.

This is even worse than I initially thought because I was already thinking it sucked that only warriors got a great new potentialable ring. =/

Not really, Katara's say on the tooltip that they can only be equipped by Dual Bladers, same with Mercedes arrows, Phantom cards and Demon Slayers Demon Aegis. This ring does not.