Cult of Masks
For countless ages, the Universes had been kept separate by the Eternal Construct known as the Gantarian Gate, a mechanism built into the very fabric of creation to regulate the flow of energy and matter between Universes. Over eons, the Gantarian Gate had become weakened, and was on the verge of a cataclysmic failure. To prevent this, the Fates opened the Gantarian Gate, and charged the Eternal Guardians with gathering heroes from across all of creation to act as a safeguard against those who would use this new freedom of movement between Universes for evil.
This is not the story of those heroes. Instead, this is the story of lesser folk who, while looking for new ways to survive in a sea of endless possibility, found a secret that may hold the key to preventing the destruction of the Universes as we know them. If said folk can be arsed to do anything about it.