Vel released another sigh from his back vent, and nodded. "Very well, Nill. Lie down on this table here." He said, walking over to a cluttered table and carefully clearing it up. He held up one of his arms, and a long, collapsible blade popped out of his wrist, nearly three feet long. The other three arms were spread out, building up the magic necessary for the spell.
Once Nill got all settled down, on the table, he'd place one hand on her hair, clutching it tightly, another on her heart, and a third on her forehead. She'd feel herself going numb, and after a minute, she would go completely stiff, and her body would freeze up, her chest no longer going up and down.
From her perspective, everything went dark, like she had nodded off to sleep.
To test it, Vel tried to lift one of her arms, only to find it frozen in its spot, impossible to move. She was now time-locked.
Without wasting any time, Vel promptly severed her head, catching it just before it hit the ground, and holding it up for a few moments. It didn't bleed, so it was further proof the spell was working. The sword went back into his wrist, and he went to work reattaching her head. Using two arms to hold it in place, Vel conjured a spectral thread and needle, and sowed her head back on perfectly. He snapped his fingers on one hand, and the threads disappeared, knitting the flesh, nerves, and spine back together and leaving no trace of the injury.
He placed his hands back on her heart and forehead, and she'd slowly come back, albeit feeling really numb and having a slight pain on her neck. "Numbing's a side effect. Give it an hour or two, and you'll feel perfectly fine." Vel said, holding a hand out to help her off the table.