Pages 14 and 15. An existential and by all metrics of this setting incredibly powerful threat corners some characters who aren't the MC - and then the MC disposes of it, within the span of two pages, with just the words "That thing's size looked troublesome, so I just used erasing magic on it.".
That is Mary Sue writing. Like, holy fuck.
Most elements and characters in this story aren't bad at all. In fact, they're pretty good. But the story as a whole would have been a whole lot better if the MC's stats would not have been literally infinite.
Seriously. Let the guy have some limits. Let him have some actual struggles. Let him have some foes that he can't overcome in less than a handful of pages because of convenient plot bullshit.
Not that this setting is overly consistent or balanced as it is - but this story would have been so much better if the MC couldn't just learn any magic by being in its general vicinity, and if his failures/shortcomings would have had some actual consequences, instead of just "oh hey, imma just master this impossible-to-learn-for-humans time-rewinding-magic in one go and resurrect my wolfie waifu who was more-seriously-than-seriously-dead just a few panels ago"...