In the movie Dungeons & Dragons: Honor Among Thieves, one of the magic items the characters come across over the course of the film is a Hither-Thither Staff. This wasn't invented for the film; it exists in D&D 5e online resources, but the thing that immediately caught my attention was the way it was portrayed in the film: to put it simply, the movie version is basically a Portal Gun reskinned as a magic staff.
This makes me wonder. How long has this item been a part of D&D? Was it introduced before or after October 2007, when Portal was released, and if before, did the item's description or abilities change significantly after Portal came out?