Realms

Realms are alternate universes, in which there is a boss that possesses a Boss Sword. Voyages are trips to a realm, and are restarted whenever all humans in the realm die. Anyone who participates in a voyage has until the black sun in the sky disappears to take possession of the boss sword of the realm. If one doesn't reset themselves before the black sun disappears is thrown into the shadow hour, and cannot reset at that time. It is unknown what happens if someone survives the Shadow Hour.