Telesto is a fusion gun that has been filled with bugs and glitches, that Bungie tries to disable it, so they can fix it. This past month, players have found a way to re-enable it to be able to use it in PVP. Telesto was my favorite gun back in Destiny 1, then they brought it back in Destiny 2. It has become a meme at this point because of all of the bugs and glitches. Here’s a video (not mine) to show how to play it in pvp. Bungie will probably fix it quick, so try it out real fast if you want to use it in pvp before Bungie disables it again.