Historic Future "Blast from the past... or is it future?" Exotic scout rifle that has to be built! You have to find Vex weaponry from chests on Mars and Venus. Then take it to Gunsmith to get Unstable rifle. After getting Unstable rifle, go to Xur to get Vex Time Core. Tier 1: Lord of Time- Regenerates ammo over time. Tier 2: Time lock- has chance to stop Minotaur from teleporting as well as shield recharge. Does bonus damage to Vex Majors