Tie her up in demonic chains

He flicked his wrist. It was a casual, dismissive gesture, but from the blazing red aura around him, thick, shadowy tendrils of dark energy shot out, lashing through the air like living whips. Chloe tried to dodge, to phase away through the wall, but they were too fast, too numerous. They moved with unnatural speed, anticipating her thoughts. They wrapped around her ethereal limbs, her torso, her neck, tightening with an impossible, crushing ****. They didn't hurt in a physical sense, but they burned with a soul-deep cold, a spiritual frostbite that drained her energy, sapped her will, and pinned her helplessly in the air. She was bound, a shimmering, terrified ghost caught in a demonic web of living shadow.

“There now,” Valerius said, a cruel, triumphant, utterly beautiful smile spreading across Chloe’s face. He admired his handiwork, watching her struggle futilely against the shadowy chains, his head tilted in smug satisfaction. “Much better. Now we can have a proper conversation, you and I. Equal footing, after a fashion.” He strode closer, circling her trapped, helpless form, his voice dripping with a condescending, chilling pity. “You truly disappoint me, little bird. I was beginning to enjoy our game. Your silent, horrified observance from the ether added a certain... piquant spice to my experiences. A secret seasoning of despair. But you just had to try and ruin the fun, didn't you?”

He reached out and traced the outline of her spectral cheek with one of her own physical fingers. The contact sent a jarring, sizzling shock through her entire being, like a thousand volts of spiritual electricity. “But all is not lost,” he continued, his smile widening. “In fact, this presents a fascinating new opportunity. A new experiment. I have cataloged this vessel’s responses to pleasure, to fear, to lust. But I have never had the chance to study what happens when a disembodied soul is subjected to... **** duress. Can a spirit break? Can it be... unmade?”

His smile widened further, turning truly, beautifully sadistic. The shadowy chains tightened, and Chloe screamed, a silent, spectral shriek as she felt her very essence begin to fray at the edges, the silvery light of her form flickering and dissolving like smoke in a harsh wind. This was it. He wasn't just going to keep her body. He was going to destroy her, erase her from existence, while her own stolen flesh stood there and watched.