a necromancer pulsing with necrotic energy, power auras, sigils, tattered cloth robes, substance 3d painter, pbr textures, physical based rendering, intricate artwork by tooth wu and beeple, greg rutkowski and artgerm and justin gerard, cinematic, hyper realism, high detail, octane render, unreal engine, 8k, vibrant colors, smooth gradients, high contrast, depth of field, aperture f2.8