In other hard mode news... (Destiny)

by dogcow , Hiding from Bob, in the vent core., Tuesday, October 27, 2015, 20:18 (3554 days ago) @ slycrel

looks like there's more to find in hard mode.

https://twitter.com/DestinyNews_net/status/659110345148125184

Says Luke Smith:
In Hard mode, all of the boss fights have a new mechanic, a new element.  There's also Challenge mode -- a particular way of killing a raid boss that gets you a special emblem and a reward.  Mathematically, you've only seen or completed five-thirteenths of the raid.

What'll ya bet it's taking Golgoroth down in one round with all 6 globes? Possibly just never "losing his gaze"; which is possible if the gaze taker goes invisible, the text then says "Golgoroth's Gaze Vanishes" instead of "Golgoroth's Gaze is lost."