To the possible 6th chest of the Vault of Glass. The Pocket Infinity was developed using notes and research from the dead (or lost in time) scientists who worked at the Ishtar Collective on Venus. In grumpier cards this same group of scientists is said to have discovered a way to duplicate themselves and send themselves into alternate realities and timelines using Vex technology in a final effort to stop them. The grimoire also describes how the Pocket Infinity is a stepping stone in between human and vex tech because it is still set back by a charge time but can fire in full auto. It has been previously speculated by explores of the Vault that the way to opening a secret area in the Vault is by equipping a combination of Vex and human technology and having the Pocket infinity as he keystone in the middle.