These screenshots show the single-player game, but in co-op mode the battle works the same way. This challenge may even go faster in co-op since each player can work on a different enemy. One may succeed where the others don't.

Pick one of the enemies who's standing on a raft close to the basket. Swim or jump over to him...

...and plant a remote bomb so just the edge of the blast radius touches the enemy, rather than the bomb itself.

Then detonate the bomb to launch the enemy into the basket.

Shoot the switch to raise the basket.

Then wait for Sobek to rise up and devour it.

You'll then receive a MAX HEALTH UPGRADE as a reward.

NOTE: This challenge can be tricky. The enemies don't always appear on the rafts near the basket, and sometimes the bombs kill the enemies rather than flinging them through the air. If things are not going well, don't hesitate to reload the last checkpoint from the main menu. You may find the enemies appear in better spots next time around.

Once you've completed this challenge—or if you don't care about the challenges, or you're going for the 3-minute time challenge—ignore the enemies and focus on getting one of the time bombs into the basket, just as you did before.

Again, choose a bomb that's already fairly close to the basket if possible. Plant a remote bomb behind it...

...and then detonate the bomb to launch the time bomb into the basket, all the while holding up the Staff of Osiris so the bomb doesn't explode.

Then shoot the switch to raise the basket with the bomb in it.

Sobek will then leap out of the water and devour the bomb. Meanwhile, you can try and fight the other enemies or just avoid them.

After a few moments, Sobek floats to the surface. Climb on top of him.

Place a remote bomb on the scaly, red patch on his belly.

Then detonate the bomb to injure him again.

[Part 1 | Part 3 | Return to the Tomb of Sobek Walkthrough]