Originally posted by Astner
Any of the instances mentioned (Extant, Flash, Gog). And any time travel that makes a noticeable impact, e.g. Flash saving his mom, disrupts the omniverse, according to what the comic says.This is not outside the power of the Silver Surfer, in fact it's something that he should be able to accomplish trivially.
Yeah, but Flash needed to absorb the entire Speed Force to do a noticeable impact, Extant has entropy to collapse the entire timestream, Gog broke the barrier of Hypertime and beat Mxy
We also have some cases indicate you can't change the timeline under normal circumstances in DC, unless you have enough powers(Flash absorbed SF) or specific powersets(Thawne can do that, but even he can do that, he didn't change the timeline on a crisis-level)
The timeline can't be changed under normal circumstances, Thawne could because his powerset and he killed Barry's mother.
The same writer wrote Flash absorbed the entire SF to change history in order to save his mother and triggered Flashpoint
https://ibb.co/qNbFfgh
https://ibb.co/JdYLJ7z
So even you assume Surfer can time-travel in Marvel. It is hard to transfer it to DC. Since the rules of DC are different from Marvel
And it is also hard to say Surfer can do this on a crisis-level....since Thawne, who is also changing the timeline all the damn time, hasn't trigger a crisis-level time change yet