[@Lady Selune] I'd say yes he can slow down carbon, but it's a lot harder and also wouldn't be as dramatically powerful. He could maybe make someone feel cold from a distance, and could maybe freeze off a chunk of skin if he was holding on to one spot on someone for several minutes. The worst he could do in any regular situation is maybe give some mild frostbite if he grabbed a body part for a few seconds. The main strengths of the power come from cooling non-living matter and making ice. Maybe if this RP goes on a long time he could graduate to doing cooler (pun totally intended) ice things