Board Thread:Questions and Answers/@comment-38678691-20190424081052/@comment-26256072-20190426220943

A user of Complete Arsenal has ALL powers that exist within his/her canon. If Omnipotence is a "power" within that canon, the user of Complete Arsenal must have it. If Omnipotence doesn't exist, or if it's not defined as a "power", then the user of Complete Arsenal may not have it.

Metapotence is essentially the same power as Omnipotence, but without the "one-above-all" criterion. Omnipotence can only have one supreme user, while Metapotence can have many users.