Stargazer

Much like there is both matter and [[wikipedia: Antimatter|antimatter]], at least some forms of Investiture can be transformed into a substance known as '''anti-Investiture'''.{{book ref|sa4|part=ars}} Currently, the only known forms of [[anti-Investiture]] are [[anti-Stormlight]] and [[anti-Voidlight]], which can be made by at least partially isolating [[Stormlight]] or [[Voidlight]] respectively from their Shard's pure tone and then exposing it to their Shard's opposite tone;{{book ref|sa4|97}}{{book ref|sa4|104}}{{wob ref|14778}} [[Khriss]] seems to believe additional forms of anti-Investiture are possible.{{book ref|sa4|part=ars}} Anti-Voidlight, at least, looks mostly similar to regular Voidlight, but appears to warp the air around it.{{book ref|sa4|97}} When anti-Investiture mixes with Investiture of the same type, the two annihilate in a violent explosion; if the Investiture in question is the soul of a person or that of entity composed entirely of Investiture, like a [[spren]], then this annihilation results in their permanent death.{{book ref|sa4|97}}{{book ref|sa4|104}}