If you have jaethal as special when resting you get undead guardians. If you do this when resting during a mission. They appear when your attacked and they die right after. Bonus when you wake up there bodies are lootable. Got like20 sets of masterwork longswords and armor. And plain heavy shields. Nice free loot. Note: This glitch was performed on an unpatched version of the game. It is likely to eventually get patched.