Planelock
Religious event
300 DE
He Who Plays With Particles sealed the doors between the various planes of existance roughly 3 centuries before The Sleeping. Some myths say this was due to his desire to stop Asmodeus from influencing his younger sibling "He Who Set The Stars In Motion" any further than he already had. It did however, have the added effect of locking out the rest of the planes from interacting causing these planes to have formed far more internal cultures in the last two and a half milennia than they once had before Planelock. Alas, this did not stop "He Who Set The Stars In Motion" later from becoming "He Who Does Not Sleep" so perhaps it was too late.
