So it's been going on since week one. It used to be rare, but someone would have a yellow glow and hard as hell to kill. Now (especially today) they're everywhere! It looks similar to the buff you get from the Rat King, except these people have a constant buff and do not have RK equipped.
I had a 1.73 kd for crucible, now after 5 matches i might be down to 1.6. (they were everywhere in every match) what the hell is this buff and why are they so damn hard to kill?
Haven't seen any yellow guardians but I play with a colorblind setting. Maybe it's the overshield that procs when sentinel titans melee someone. It procs for whole team that's near.