In his teaser, and from his voice, he seems to want to annihilate everything, and the void is something. He has the power to destroy stars and worlds, and has done so already. Is he stronger than Aurelion? Or, is he even part of the void, or something more powerful? Is this the strongest "Skin" character in league?
In his lore, 
was controlled by the Targonians into battling destructive beings that threatened the world.
What if Dark Star 
was the cosmic power that had to battle in an alternate reality?
If so, then would be stronger. is the Star Forger after all, and this skin is Dark Star
's power brought into existence. Dark Star seemingly controls black holes and worm holes. can do those as well and more. I would say that is stronger.
He doesnt exist in the lore since is a skin, but if he existed, he would be stronger than the Void since he says: "We have looked into the Void, and consumed it."
However, in comparison with Aurelion and Bard, i guess that he is at the same level of Power.
And we cant forget Kindred as well, even if he destroys things, he still being a "living" thing and can be destroyed.
But.... he is the strongest "Skin Character" lorewise?
I dont think so.
Skins that could be more powerfull or at the same level of power are:
Reaper Soraka and Grim Reaper Karthus: They are a representation of Death itself, like Kindred. Infernal Nasus: "Satan" Divine Soraka: A divine entity. ** Lunar Goddess Diana:** A Goddess. **Super Galaxy Brigade (Super Galaxy Rumble as Leader): ** Super Galaxy Rumble is Based on the Gurren Lagann, in his final form he becomes Super Galaxy Gurren Lagann. Assuming that Super Galaxy Rumble has similar powers, he can combine his mecha with Super Galaxy Kindred (death itself), Super Galaxy Chomper (Fizz), Super Galaxy Shyvana and even other mechas like Mecha Sion, Battlecast Chogath, etc in order to reach a final form that can fight against Death Star Tresh (Who has a similarity with the Anti Spiral of Gurren Lagann). Final Boss Veigar: Since he is technically the final boss of the game and he can corrupt the code of the game itself, he can just "Delete" Dark Star Thresh from the game... His power is over 9000 and that is nor even his final form. Cosmic Reaver Kassadin: We dont know much about this skin, but he seems to have similar powers in comparison with Aurelion or Bard, Eternum Nocturne/Reksai: An entity that transcend time and has existed since the begining and it will be the last thing in existence (according to Nocturne)... they also learned of spin to win.
I'd say stronger as in one of his emotes (taunt i think) he looks into his lantern and shows a champion portrait, being either lucian, taric, bard, aurelion and astro teemo.
so take that as you will
Krimzon bud, I think you can make your own conclusions because there's no right or wrong answer to your question. Granted there is no answer to this question but that doesnt mean we cant humor you with a speculated response. Stuff that Ebonmaw dude he sounds like an ass.
