Heat was a Ta-Ree spell capable of being wielded by Ascendants on the planet Kathol. The spell was used to increase the vibrational speed of molecules in solid objects, in turn generating heat. This spell could be used to heat hand weapons and armor, causing them to be dropped or removed by an opponent. Particularly proficient users could even use the power to incinerate a target object. Ascendants were required to known the psychokinesis spell to use the heat spell.