Santa Somnia is an imaginary saint, shaped like a medieval folktale figure, who steals the sleep and childhood creativity of his victims to feed a kingdom of oblivion and torment. The album's lyrics follow the journey of a protagonist stripped of rest and innocence, wandering through a decaying dreamworld reminiscent of Dark Souls, Bloodborne, and Elden Ring. Santa Somnia becomes an allegory of lost hope and the crushing weight of adulthood, drawing further thematic influence from the bleak darkness of Kentaro Miura's Berserk. Santa Somnia is a sonic trip through a crumbling psyche-- drenched in despair and shadows-- ruled by the struggle against madness brought on by sleeplessness, the inner torment of depression, and the inevitable, sometimes merciful, pull of death.

The influence of FromSoftware and Berserk emerges through the album's cryptic, oppressive storytelling, where the line between nightmare and reality barely exists. While rooted in the band's earlier works, the sound of Santa Somnia blends the crushing weight of doom metal with classic and thrash metal elements and injections of punk- rock melody, mirroring the emotional instability and mental agony woven throughout the lyrics.