NOTE: This walkthrough explains how to get through this section without touching the time bomb. If you don't care about beating this challenge, or if you are doing the 7-minute challenge, just follow the same basic steps using a combination of remote bombs and grabbing/rolling to move the time bomb.

From the crumbling wall where you will need to place the time bomb, head to the right and down the stairs.

Keep the Staff of Osiris raised the entire time you're manipulating the bomb so it doesn't explode prematurely. Start by placing a remote bomb behind the time bomb and blasting it toward the ledge with the square pressure pad.

Then place another remote bomb under and behind the time bomb (roughly on the spot indicated by the black scorch marks on the floor) and use it to blow the time bomb onto the ledge with the pad.

In co-op mode, if you plant 2 remote bombs behind the time bomb while it's still on the round pad, you can probably fling the ball onto the ledge in one blast. When the ball lands on the pressure pad (or you step on it) the gate opens.

In co-op mode, a bunch of enemies appear, including scarabs, flaming scarabs, and possibly some skeletons. Take care of them and go back for another time bomb if necessary.

Now use remote bombs to maneuver the time bomb beneath the ledge on the right, taking care not to blast it into the pit. If that happens, you'll need to start over with another bomb.

Blast the ball up onto the ledge...

...then over to the crumbling wall.

Once it's in position, you can lower the staff so the bomb explodes, opening the way into the next room.

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