@ william shadow
pls don't make baseless assumptions and expect us to just take it as fact. Assumption 1. Zeref is immune to low tiered spell because he's island level. NO, it doesn't work like that. 2. Zeref is resistant to Ainz hax because he's stronger. NO, it doesn't work like that. You don't seem to know the definition of hax. And the way you claimed you know more about overlord, and is a big fan (which is irrelevant), then proceeded to present wrong points (Ainz timestop only works on 1 person, TGOALID won't work on Zeref because he's 6-C), it's so funny i'm not even laughing.
Once Zeref Gets hit by a TGOALID buffed instant death skill, thats it. Zeref can spam his death magic all he wants, it wont do a thing to Ainz, since he has Intant death invalid. His high damage nukes can easily be evaded by Timestop and Tp.
They both have TP, Timestop, and Instant death magic, but Ainz has a counter for all three while Zeref doesn't.
PS. That part where you said that Ainz would've lost against shalltear had Aura not stopped her, it's half true. Ainz was winning, he was going to kill Shalltear but at the last second he hesitated, Shalltear found a chance, Aura stopped/distracted her, Ainz Ooal Gown banzai.