Part of “The Witness “ lives inside Telesto, much like a horcrux. Each time we use this gun, we help break the universe. We love this gun so much, we will never destroy it. Therefore “The Witness “ will live forever and continue bringing ruin. The agents of the Nine actually work for The Witness. Think about it, every so often they have Xur bring Telesto to us for sale. Banshee is even cleaning Telesto at his vendor shop right now.