I've been getting nowhere myself on this.
My goal is to create a human or humanoid that absorbs heat to survive. As a result this can quickly freeze things solid. I need a way to make this, for lack of a better term, 'cryokinesis' (no tech or magic) in a way that could freeze someone solid without killing them or having them suffocate under the ice. My thinking was to have them somehow placed in suspended animation, that way they would not be functioning enough to break the ice, and still be alive.
But how would the ice form? How would the freezing be done? What would the biology of the human/humanoid need to be? (keep in mind that this being is still related to humans if not completely homo sapien. No aliens or monsters.)
Is there any way to make this work?