In my homebrew, Anenek was the actual Ogre Doom, in the final battle with the Ogres (who are more like Psionic versions of DragonLance’s High Ogres - very low birth rate, feel a kinship to the element of Air and lived much of their lives wandering or in mountain top monasteries) he was caught in an Air Sphere. Kalak was his second in command, a Warlord second in psionic and arcane power only to Anenek himself. When his Champion was imprisoned he finished off the weakened Ogres and declared victory. He then led the remains of the army to Tyr and took over there. Over time he appropriated the title of Ogre Doom himself.
The Elemental Spheres were created by a epic spells, first created by the dwarves who used the power of Earth to imprison Egendo. It could only be cast by dwarves but two other races were able to adapt it for themselves. The spheres slowly drain the life force of those contained within (permanent level loss every 100 years until the prisoner is no longer an epic character at which point they are freed). Any magic or psionics directed at the sphere are absorbed and those who touch it are also absorbed.
The Ogres created an Air Sphere that trapped Anenek above the Mountains of the Sun and the Sprites were able to imprison Ceilbia Sprite Claw south of the Dead Lands in the Ghost Rivers. Ceilbia is Sielba’s twin sister (which is why they were often confused). When Sielba faced Hamanu he sundered her Mind, Body, and Soul. Her mind went to her twin sister’s body due to an old failsafe they set up, so it’s been trapped as well, her body was spirited away by her cult, his soul was sucked into a bottle that’s been sitting in one of Hamanu’s treasure rooms.
Irikos was leading the invasion of Bodach when he was burned to ashes. Since each Champion was bound to the Prisine Tower and would resurrect there the only way to prevent them from just coming back was to find a way to imprison them. In Bodach they did not have access to the Elemental Sphere spell but they were able to bind his essence into those ashes. He’s currently a unique ash elemental swarm bound to the old city limits of Bodach. He’s only active at night when he and his armies replay the battle of Bodach.