The Void-Speaker

The Void-Speaker
The Void-Speaker is the mutated, fanatical leader of the Echoes of Ruin, a faction composed of those who have survived exposure to the most corrupted depths of the Mana Wastes. His body is a horrifying fusion of flesh and crystalline Void-Iron, and his eyes have been replaced by two pulsing, purple gems that seem to leak a fine mist of necrotic energy. He is no longer a man; he is a living anchor for the Void, a reality-warper whose very existence causes the laws of physics to stutter and fail.
He claims to be the "Herald of the Final Silence," preaching that the Aether is a poison and that the only true peace can be found in the total annihilation of the material plane. His "voice" is a psychic intrusion that can shatter the minds of lesser beings, leaving them as mindless husks or obedient servants of the Void.
Secret Motivation: The Void-Speaker is actually a former Kigum High Mage who attempted to find a way to "cleanse" the Mana Wastes. Instead, the wastes cleansed him of his sanity. He is now a living host for a Void-Ego—a sentient, non-biological intelligence from the Void that is using his knowledge of Kigum’s defenses to plan a massive, coordinated attack on the city's Aether Node, intending to use the city's power to "invert" reality.
Adventure Hook: A series of "psychic massacres" has occurred in the frontier towns near the Mana Wastes. The survivors all report seeing a figure with "gemstone eyes" who didn't kill with blades, but with a single, silent word that made reality dissolve. The party is tasked by the Kigum Council to assassinate the Speaker before he can reach the city walls.