A Returner's Magic Should Be Special - Vol. 3 Ch. 173

[MangaDex]

 

[Wildfire]

Dude... Lets just ignore the extremely stupid reason for not wanting to talk about the future, seriously "unpredictable things might happen" back when he said it things had already changed a bunch and since then we have had a massive war that was not in the other timeline.

But why the fuck would you not tell the tower master about it before you do an extremely dangerous experiment that might kill you.