[@David Gorgon]
Even as a one-time thing it's pretty OP and doesn't lend itself well to [h3]SICK-ASS COMBOS[/h3]. Honestly I feel like you should nix it or debuff it. An AoE, explosion type move with a smaller radius would be acceptable, just not insta-killing the entire boss arena in one go.

[@Grec]
Alright let's go ahead with the tighter lore, I'd also appreciate a more precise explanation of what the shadow-tenctacles are/can do. If you want fisticuffs, a gauntlet-type DA would allow DT and honestly sync well, maybe open up the path to a more unique powerset.