Board Thread:General Discussion/@comment-29853277-20170719023533/@comment-29853277-20170908005359

Being Zeroth'd basically means you have become one with the Zeroth, because the Apeiron consumes you and merges you back into it. And like what happens when any being merges with an omnipotent, they are sublimated into it, losing all individuality aand that's the end of them.

Alex's ability is incredibly powerful, because he's channelling Alaya which passively maintains the space-time of the solar system from the moment any sentient being emerged, the concepts, physics, and laws of the solar system, and the existence of several pocket dimensions that serve as the afterlive worlds for the soul to go to (not sure if that just makes it a haxxy version of 4-B or 2-C?), and Alex can basically negate anything that Alaya doesn't like. But that also means that his power is linked to the Alaya of whatever world he is in (so if there isn't one, or it is broken he can't use his power properly), and is only as strong as that Alaya is.

As for who could take them out, I haven't really put much thought into how powerful they actually are, so I don't know if any of them could kill those characters because I don't know what their powers are. Just the mechanics of how they work.

But in terms of sheer survability of one of my main antagonists I have in mind, he managed to not Zeroth for 1000 years depite being in a near-mindless conceptually-erased nonexistent state for all of it (and for all of that he was actively trying to come back, despite having his regeneration constantly negated by a council of extremely powerful Hallows in their own right). So:

Masada - I don't know all of the characters, but honestly probably no one except the Hadou/Gudou Gods could put him down for good. BFR is an option though

Warhammer - the whole "erase them from every layer of existence even from higher dimensions" thing the GEoM has going on could take him down. Same with Yncarne. Don't know about Ahzek. Again, BFR is also an option.

Bastard I don't know enough about. But there's a bunch of 3-As there, so they could definitely put him down... I just don't know if they'd be able to keep him down.

Umineko... well, all the higher layer people could. Anyone less than that though... not so much.