The void lullaby
Background:
An unidentified humanoid emerged from a void rift, known as Mantra for its ability to chant songs that affect the human mind through a mouth-like organ. Those affected become self-destructive or attack others. Additionally, Mantra converts sound waves into energy, creating high-frequency vortexes that can cut through individuals via spatial fission.
Despite its sanity, Mantra cannot communicate normally. Its cracked, white porcelain skin reveals sickly red tissue, indicating that a human host has been parasitized by the void.
Sketch ideation