Bungie announced on Twitter they needed to change the Nightfall strike for the second time within the last two weeks, on Destiny 2.
This weeks Nightfall was supposed to be Exodus Crash on Nessus. With the modifies as Timewarp: Rings — you and your team have to jump through to add 30 seconds back onto your countdown, and Prism — which rotates the elemental burns so you do more damage during the burn that shows up on your screen. Initially, the Prism modifier was broken so the element would only flash for a second, making it very difficult to know what element would do damage.
However, this time the Nightfall wasn’t suffering from a modifier issue, but a problem with the Arc Beams not spawning in the Prestige version.
So the Nightfall has been changed to the Pyramidion. The modifiers have been changed as well, Zero Hour: which doesn’t allow you to extend your time at all, and Torrent: this increases the rate all your skills recharge.