I realized that it probably is. Because Apocalypse Bringer Curse, which is confirmed to be King Nero’s Curse, was actually teal with a black aura (Morden is the reverse where it’s black with a teal aura).
Apocalypse Bringer might actually be the closest to Chaos as a magic, as the magic’s nature being an “Apocalypse Bringer” sounding similar to what Chaos does, and this also justifies why this Curse is even a thing (since if it’s an Elemental, it’s odd as it doesn’t sound like an element).
This could also explain why King Nero was crazy and decided to commit a genocide (as a powerful Curse can affect the mind, though idk if this was Elemental)