Supernatural entity in stone archway with blue lightning

Digital painting of a hooded supernatural entity standing at the center of an ancient stone archway

Subject: A tall, faceless figure wrapped in a tattered dark cloak that flows around its form like liquid fabric and emits faint golden sparks across its surface

Clothing: The hood casts deep shadow over the head while long sleeves drape down to obscure hands ending in skeletal or claw-like digits gripping nothingness. 

Action: Standing upright with arms slightly extended outward as if channeling power, surrounded by crackling blue lightning arcs rising from floor and swirling around shoulders. 

Environment: Dark cavernous space framed by rough stone pillars forming an arch behind the figure; misty atmosphere fills background suggesting depth within underground ruins or magical realm entrance. 

Lighting: Dramatic contrast between glowing electric-blue energy emanating from body and ground versus encroaching darkness of surroundings creating eerie silhouette effect against faintly illuminated backdrop walls.