The Covenant (works in co-op as well)
Normal or higher
- Mission has to be started from the beginnning
The IWHBYD Skull will be at the very end of the mission "The Covenant". When you first come to the room ignore the 7 rings and fight your way to the end where you have to extend the bridge. This will trigger a cutscene and you will have to fight your way back. Once you are back at the beginning of the room you will have to jump through the rings in a specific order.
The rings are numbered from 1-7, starting at the beginning all the way back to where you extended the bridge. (0:51)
Always jump through the rings facing the extended bridge. If you make a mistake you can simply start at the first ring which is 4. REGULAR ORDER:
4 6 5 4 5 3 4LONG VERSION:
(Could be necessary in co-op but i'm not entirely sure)
If the short combination doesn't work you will have to try this sequence.
4 5 6 5 7 6 5 4 1 2 3 2 7 2 1 3 4 6 7 5 4 6 5 4 5 3 4
If you did it correctly the rings will light up and you can collect the skull at the extended bridge.
Thanks to Breadly Weapon
for the heads up and confirmation on the long sequence :)