So! Imagine a taken type that is pure darkness and takes the form of guardians (or fallen guardians) the attack they have is they can mimic any of the 9 sublasses (with the look of the class.) They could be a red bar enemy or a mini-boss such as the fallen walker tank or the cabal Goliath tank. The distinction from a regular guardian in pve could be it has a smoke trail about ten feet back. It tries to fool you by having one of your friends psn/gamertag. Feel free to make suggestions or comments saying what should be different or just minor add on or take aways