Description
Xenoblade Chronicles vs Avesta of Black and White
Two gods who created the universe (the world of Bionis and Mechionis and the First Heaven) who, previously, were normal (well, "normal" in Mitra's case) humans that, after a certain incident involving a incredibly powerful extradimensional object (Klaus's using the Conduit and Mitra creating the Throne), it ended up with the destruction and creation of the universe, which, consequentially, also ended up with them becoming evil/insane (Claus being separated into a good and bad half, with the bad one being Zanza and Mitra witnessing Naraka, which is kinda like a lovecraftian horror and made her insane). And so, with their new godhood, they created a universe that was forever in war between two contrasting factions (Bionis, the biological ones vs Mechionis, the mechanical ones, and Ashavan, the side of good vs Dragvant, the side of evil). In the end, both ended up being killed by another person who also became godlike (Shulk and Magsarion) and ended up creating a new universe contrary to theirs (The new world and the Second Heaven)