When worlds collide
The Obelisk is a construct created by the combined will of all four of the worlds Gods. It manifests in the mortal reality as a large black pillar. In the Godspace it manifests differently for each God. Mortals attempting to use magic to look inside the Obelisk see only darkness. Mortals attempting teleportation magic to enter find themselves outside in the place where they left, usually with a large headache.