Bag of the Forgotten Archmage

An infinite amount of time ago in a dimension long forgotten, the powerful archmage and ruler of an entire continent, Vrunaxx, crafted an unassuming bag with the symbol of abjuration woven in golden stitching on the front. He set out to preserve knowledge within this bag by placing all of his texts, scrolls, and spells in the bag which had an endless amount space within its fabric interior. Once sealed, Vrunaxx spoke the command word and the bag exited his plane, along with all of the planes of his reality; the bag settled in a new reality unlike the previous one. For countless years, adventurers have found this bag and sent it to other realities with gifts for the next person to come across the bag. As for Vruaxx, he placed all the written knowledge he could in the bag before he used a Ring of Three Wishes to rewrite his reality with three commands: anything magical never existed, any plane other than the material one was destroyed, and he was the god observing his reality for the rest of time.