Search the entire platform where you begin the next chapter. There are two Wish Stones close by (to the left for one, and ahead for the other). On the far left side of the platform is an Epic Treasure Chest.
Cross the strange bridge in front of your Skylander after collecting these items. Talk to the floating robot to learn which platforms are safe to jump on. The next piece of land has areas to customize your Skylander and vehicle. That’s very good, because there is a Sea Challenge a few feet away. Trigger that to fight the Hydra!
Before returning to the main path, continue in the Sea Vehicle and go left to find a Red Toolbox hanging from a crane. Backtrack and go all the way to the right to find a Sea Vehicle dock. A Random Reward Object can be found there, as well as a Skystones Overdrive table. You rejoin the central path through the chapter once you land by the main docks. Come up there and pass through a couple of longer bridges that are made of blocks that may (or may not) be trapped. Interact with the computers before each bridge before going out. The platforms that turn grey briefly are safe. The ones that stay red are dangerous.
After the second bridge, turn left to reach a SuperCharger Gate toward a bonus area. Or, stay right to push for the end of the chapter. The Gate takes you to another extended bridge area. There aren’t any puzzles, but the ranged enemies and trapped bridges are tricky enough on their own.
Make sure to get the Random Reward Object, on the left side of the first bridge. The second bridge has a Wish Stone right in the middle, so you can’t miss that. Watch out for the Spell Punks that are guarding it; you should take them out to make your life easier while maneuvering around the bridge.
The last bridge has basic treasure on the right, and both an Epic Treasure Chest and the exit Gate on the left.
Come back through the Gate and push toward the end of the chapter. The elevator to the top has plenty of protectors. Area of effect attacks are quite strong here, especially during the first couple of waves.
Defeat your opponents and get onto the elevator to confront Kaos himself!