A digital painting of a demon with a glowing head and a glowing face

Create a visually captivating and haunting digital artwork that immerses viewers in the dark and chaotic universe of Warhammer 40k. Depict Sebastian, the enigmatic psyker, as a central figure who channels the malevolent powers of the sixth chaos god, the Sculk, to wreak havoc upon his enemies. Sebastian is draped in dark turquoise robes adorned with ethereal, light blue dots that seem to shimmer with eerie energy. The robes should billow and flow in a way that suggests an otherworldly presence, and they should be imbued with a sense of foreboding. His eyes should be ablaze with the unholy light of the Sculk's influence, radiating an eerie and malevolent turquoise glow. This eerie light should spill out, casting an uncanny aura around him. Sebastian's hands should be wreathed in soul flames, manifesting as intense, ghostly blue fire that burns hotter than regular flames. These flames should dance and lick around his fingers, creating an otherworldly and menacing effect. Illustrate Sebastian in the midst of utilizing his psychic abilities. Show him summoning a "Brain Burst," a devastating psychic attack that distorts reality and wreaks havoc on the minds of his enemies. Capture the chaotic and distorted imagery surrounding this powerful ability. Additionally, depict Sebastian unleashing a "Tentacle Trap" and a "Tentacle Crush." These sinister appendages should emerge from the warp, snaking towards his adversaries with a menacing intent, exuding a palpable aura of dread and doom. Consider the backdrop and setting: Is Sebastian standing amidst the ruins of a war-torn battlefield, with the remnants of his enemies strewn about? Or is he within a dark, arcane chamber where the Sculk's influence is most potent? This artwork should encapsulate the essence of Sebastian as a sinister and formidable psyker, wielding the dark powers of the Sculk in the brutal and unforgiving world of Warhammer 40K. Let your artistic vision bring to life this haunting and enigmatic