Battle your way to the methane reactor and claim it for Sloane.
- With the barrier down, you will need to fight on through a number more Exploder Shanks released at the end.
- Go down the slope past where the barrier was to encounter another battle between the Fallen and the Hive.
- Either engage them or wait for them to finish their short fight.
- From there, at the base, turn to the right.
- Go through the doorway there and you will encounter Heavy Shank guarding the way forward.
- Go down the corridor it was guarding and into the room beyond.
- At the opposite end of the room, you will see the Fallen Captain and a Hive Knight fighting.
- Approach them, they are Golthor, the Subtle and Mithrax, the Forsaken.
- This mission has 2 endings.
- The variable that triggers the ending is whether or not you kill the Fallen Captain, Mithrax, the Forsaken.
- If you do not kill Mithrax, he will approach and talk with the Guardian before leaving.