Summit Forest - Stormguard Sanctum Challenge Tomb - Part 1

The entrance to the Challenge Tomb is on the north end of the forest, between the wooden bridge and the tanner's hut.

Follow the tunnel to the Stormguard Sanctum Day Camp. There are arrows leaning against the wall opposite the campsite if you need them.

It's pretty dark in here, so use fire arrows to light the 4 hanging lanterns. The first is directly above the campfire. Use Survival Instinct if you're having trouble seeing the others.

There...much better.

You can also light the carved stone lantern for a little more illumination if necessary.

As usual, the treasure chest is high above. The climbing wall between the 2 huge Stormguard statues will enable you to reach it. To get there, you must first clear a path.

Stand back from the wooden wall with the debris and natural gas vents on top. Shoot the debris or the gas cloud with a fire arrow.

This sets off a huge explosion. After a short while the gas begins to flow again. So either move quickly or wait until you see the green clouds start to form. Then set off another explosion to clear the gas temporarily while you climb.

Do not use your torch or fire arrows while climbing, since this will ignite the gas when it starts to flow again. Scramble up the wooden wall and hang on. As soon as the debris burns away, pull up, hurry around to the left...

...and climb onto the ledge above, where Lara will be safe from the gas.