The realm of the Protectors was a place of infinite brightness that had no darkness. It was on a different plane of existence all together and no mortal had ever seen the place or stepped foot there before. To get to the Protector's realm, one needed to Open a teleportation Portal that led directly to the place since no known human invention could reach the place.
To differentiate other realms from the Protector realm when teleporting, the protectors had placed certain conditions or measures that everyone with the right magical power and activation chant could use when moving to the realm.
