When you enter the room, a deadly ice vent blocks the walkway on the right, preventing you from moving all the way around the spike pit to claim the reward on the far left.
Shoot the Eye of Horus switch on the left to turn this vent off.
Plant a remote bomb near the switch. Then have Lara grapple the golden ring on the platform in the middle of the spike pit. Isis (or Horus) can then jump past the deactivated vents onto the cable and balance on it above the spikes.
Keeping the grapple extended the entire time, Lara should then walk around the perimeter of the room to the right, while Isis adjusts her position as needed in order to stay between the ice vents surrounding the pit.
As Lara rounds the corner and approaches the ice vent on the far side of the room...
...detonate the remote bomb to flip the switch...
...and deactivate the vent. Now Lara can keep going around to the left, while Isis continues to ride the cable.
Once Lara is standing between the center platform and the side room with the goodies, Isis can jump onto the platform and Lara can at last release the grapple.
When Isis stands on the pressure pad near the grapple ring, the 2 sets of ice vents on left turn off so Lara can reach the goodies: the HEAVY GRENADE LAUNCHER and a MAX HEALTH UPGRADE.
Now either return around the edge of the room or jump over to the center platform then back to the ledge near the switch. Leave the tomb the way you came in.
Copyright © - Stellalune (