A dark, gothic chamber with a centered necromancer, ancient and corrupted by dar...

A dark, gothic chamber with a centered necromancer, ancient and corrupted by dark magic, standing in the ritual circle drawn in blood and ash. The necromancer's gaunt, skeletal frame is clad in tattered robes with bone ornaments, a ritual hood, and adorned with a staff of bone and crystal, floating nearby is a worn grimoire. The subject's eyes glow white, their face twisted in intense concentration as they channel necrotic energy. The chamber's atmosphere is foreboding, with an oppressive air quality, a taste of decay, and supernatural cold. Outside, a howling wind and distant thunder create a sense of unease. The room's spatial layers feature ghostly apparitions manifesting in the midground, spectral forms, energy tendrils, and shadowy wisps. In the background, gothic arched windows, shelves of forbidden tomes, and chains create a sense of depth and foreboding. Crumbling stone and ancient tapestries depicting death add to the dark, ominous atmosphere, illuminated by the harsh, green necrotic light emanating from the ritual circle.