The serious plot hole I see right off the bat is Celestia's personality. Other than for the sake of trying to be original (and it's not. Someone's probably done her like this before), I can't see why you have as being an asshole.

Okay... right off the bat, spelling error right in the title. Specifically, our beloved Sun Goddess's name.
cdn.discordapp.com/attachments/156225392200515584/592416290715729921/Screenshot_20190623-141017_Chrome.jpg

At least ascendancy and annihilation ard spelled correctly.

Seriously though, mistakes like that, misspelling a main character's name right in the title, that speaks poorly about your story.

9695311
Fixed now. Yeah, it doesn't paint a nice image, does it

Sorry about that

9695839
I'm sure that will help get more views