After receiving the gift left behind by Bechard, the deceased Obyrith lord known as the Storm Lord, in Yeenoghu's Realm, Solam came up with this idea. And the original inspiration for it had come from Demogorgon.
Do you still remember the origins of the Pearl of Greed?
At that time, Demogorgon had an exceptionally troublesome enemy. Because this enemy opposed Demogorgon, he suffered countless attacks from him, yet the Demon Prince could never breach his defenses. So the Demon Prince changed his strategy. He pretended to make peace with him and helped him establish an evil, cruel faith on the Material Plane. Once this demon lord's followers had grown to enormous numbers, Demogorgon quietly withdrew behind the scenes to watch, because he knew what would happen next.
The world where Demogorgon helped that demon lord establish his faith was already ruled by a complete pantheon. Thus, conflict between the demon lord and that pantheon was inevitable. Through Demogorgon's schemes, the demon lord became incredibly arrogant. After being struck by the pantheon, the enraged demon lord had his followers slaughter an entire city of the pantheon's believers and cast all their souls into the Abyss!
Such an unbearable humiliation enraged the entire pantheon like never before, and they immediately retaliated. The gods of that pantheon descended directly into the Abyss and pooled a large portion of all their divine power, compressing the entire plane where the demon lord resided into a sphere the size of a human head. That demon lord was imprisoned within the sphere as well. Then they hurled it into the boundless Astral Plane.
But neither the gods of that nameless pantheon nor Demogorgon, the instigator behind it all, expected the Abyss itself to strike back against their actions. Just after they cast the sphere into the Astral