

Could Sargeras destroy Fate Gaia/Alaya?
1st Scenario: Sargeras uses his power and the Burning Legion to slowly weaken, corrupt, and put agents on Earth. They have the same powers as in their home universe, including Argus resurecting the demons.
2nd Scenario: Sargeras appears besides Earth and simply goes berserker.
The fight takes place on a Fate timeline, but Arcueid can be summoned as a servant.
ORT jungle was turned into a raid and he is figthing adventurers who want him as a mount, so he cant help Earth. Crimson Moon didnt want beff so they ran way.
For the ones not familiar with Warcraft. Sargeras is/was/may be the big bad of Warcraft universe, he is the strongest of The Titans who are basically Wacraft version of Ultimate Ones, basically they are divine planets who eventually become cosmic giants (for the lact of a better term). Sargeras went mad because The Void (the other big bad of Warcraft) was atempting to consume creation, so he decided to rather burn the universe and start anew from the ashes.
His main feats are being larger than Earth (he is a planet himself), being the strongest "warlock" of Warcraft, having an inmortal army of millions of demons who he can summon, and uses fel as his main power, a kind of magic that destroys or corrupts almost anything it touched.