Upgrading 2 Nightmare Skills from 1 Glitch | BO7 Endgame

Normally, upgrading an equipped Nightmare Skill from a Glitch locks the reward cache. This video demonstrates the "swap - upgrade - swap" technique to upgrade both equipped Nightmare skills from a single Glitch for prestige 2 and 3 operators. The same technique also works for Exotic skills from World Events for prestige 1 and 2 operators. Happy hunting!