>>34162791YHVH is the Hebrew name of the Judeo-Christian god, the Demiurge is essentially the maintenance worker of creation that has near-omnipotent powers, but is super fucking autistic about perfection; if everything isn’t perfect, he’ll fucking destroy all of creation just to start all over again. Yaleabaoth is one of the seven Archons, which is essentially another interpretation of the Demiurge (or his servants, depending on the source; Gnosticism is kinda tricky to talk about in simple terminology, because you’re missing a lot of other concepts and info).
Basically, what
>>34162776 was saying boils down to a theory that while Arceus is the original creator, at one point Necrozma took up the reigns, but his flawed perspective kinda fucked things up for everyone.
Either that, or it’s just a reference to Shin Megami Tensei and Persona 5.