Voidcollector (or voidhoarder) is a subset of gendercollector for those who primarily collect genders that are related to a void/abyss/black hole or the feeling of one's gender being a void/abyss/black hole. This includes genders such as voidic, keingender, gendervoid, galaxitian, etc.
The agender equivalent is vulturehoarder.
History
The term was coined by FANDOM user AndleRandle on September 30, 2021. The flags were created by the same user on the same day.