One. the blizzard is being maintained at about -200s. Started at absolute zero. Your attacks changed that, good job. It also has Jikore assisting with it.
Two, the illusions don't take that much honestly. Hell based on a few topics the blizzard would be polluting the atmosphere with his magic signature making just how detailed the illusions need to be. God moding on this would be auto-seeing which is real and not... who was attempting to do that?
Three. Its not that the sigels are undesroyable, its that the method you went for, just will not work, and as such no I am not going to RP out a method working that by plain logic wouldn't work, working for anything more than satisfying someones else feelings. You cannot melt somethign etheal with basic heat... like wtf?
Fourth. the mechanics of water itself around Seither has been part of the character day one. Temperature hasn't really been a factor in stopping the blizzard from moment one, if anything you'd make really red snowflakes that now burn through stuff aswell. nice job.
Fifth. there's a difference between invention and inspiration caused by survival instincts. One needs time, the other does not.
Sixth. The trasportation as described and the snow as described since heat wouldn't change this snow besides maaybe coloration and weather it freezes you or slams through you wouldn't change anything.
Anyway, if you noticed, the waves were done with, as in control lost over those.
As far as the attacks and what not. If you noticed Seither isn't exactly a fine turning fighter and is steelly concentrated on his attack. Yes he can do all this, no issues. No god-modding what-so-ever.
How about you Post IC and think of things that actually affect what I do, not my problem when it doesn't. I do not God-mod, and I am getting sick of all these god-awful OOC conflicts when someone doesn't understand that, no just because you thought your brilliant defense or tactic would save you, doesn't mean it would.
The planet wide blizzard happened before the volcanic crap anyways...
Oh, and personally, I would have been nice to have been PMed first, and at least tried working this out 1on1, because honestly, I am sick and tired of not a single topic being truly IC because no one having the integrity to stay IC.