Nothing special here, just a Chaos Space Marines Accursed Cultist done with Army Painter Speedpaints over a Grey Seer prime. The metal bits are Citadel Runelord Brass and the claws and nails are based in AP Warpaints Pale Sand. The robe got a base coat of AP Company Grey.
Perhaps it is a more common sculpt, but I didn't have it in my general purview. So, I'm glad you shared your work on it. Looks terrifying (but in a good way)!