The Oblivion Barrier

The Oblivion Barrier is the barrier that keeps Hell, The Godly Planes and Kierra separate. Without it, the three realms would collapse and probably destroy all that is known.

Creation
At the end of the first era, the end of the great war, the Arch Demon of that time, Diabolus, sacrificed himself to save every living creature on Kierra, even though it is believed in many religions that this is not true.

What really happened is that the Angel forces under the command of Arch-Angel Gabriel created a weapon that would eradicate everything unangel from the planet. A giant energy crystal filled with angelic energy, ready to be deployed deep within the core of the world. Diabolus and his Royals intercepted this crystal before it was deployed and Diabolus, upon reaching it in the middle of a fight, wrapped himself around the crystal and took in as much as he possible could as it was deployed. With this, he reached his fifth and final stage, taking in all the energy and seperating the realm of Kierra in three different realms. Hell, Godly planes and Kierra. He banished the Demons to Hell, the Angels to the godly planes and all other creatures to Kierra. He himself then became a giant field of invisible energy that flow through and around everything.

Even though this happened, a lot of religions believe the opposite. They believed that the barrier was created when Diabolus tried to kill everything undemon on Kierra by using his full power. That Gabriel pierced his hearth before it happened and instead of killing, banished Angels and Demons to different realms. Most of them deny the existence of this barrier even.

Bindings
Both Angels and Demons are equally bound to the barrier. They are protected by it, making their souls unreapable by Necromancers, their souls always returning to their own realm where they would have to escape their death in order to live again. Yet, if they die in their own realm, it will be the end for them. No after live, their souls break up into soul essence and are returned to the Astral rift.