Painterly fantasy book cover featuring an angelic humanoid entity merging with geometric and mechanical alien forms.

Vertical 2:3 literary book-cover composition for a dark metaphysical speculative novel. At the center, a beautiful and imposing humanoid entity appears initially like a traditional biblical warrior angel: luminous human face, enormous wings, radiant aura, and a blazing sword. But this is only the observer's first interpretation. The figure gradually morphs from angelic to vaguely demonic and finally into something utterly alien and abstract. Its anatomy dissolves into impossible geometry, electrical filaments, concentric structures and non-Euclidean forms. Surrounding it is an intricate visionary geometric pattern reminiscent of M.C. Escher: interlocking wings, innumerable eyes, wheels within wheels, recursive sacred geometry and impossible perspectives, but no literal pentagram. The geometry should feel simultaneously ancient, religious, mechanical and extraterrestrial. The suggestion of the Ark of the Covenant should be abstracted into a luminous geometric enclosure or inverse electromagnetic cage, not a literal ark. The entire composition should feel like a chemically induced religious vision of an extradimensional intelligence, where familiar Christian imagery gradually breaks down into something incomprehensible. Avoid conventional fantasy creatures or literal biblical scenes. Beautiful, ominous, mysterious, intellectually unsettling, symbolic rather than illustrative. Painterly visionary fine art, intricate detail, dramatic illumination, not photorealistic, not a Voir plus