Start this chapter off by grabbing the Lightning of Zeus upgrade from the pedestal. As usual, enemies will spawn as soon as you grab it, which include Satyrs with Javelins and Clubs. When they're all dead, the gate will open, so go through it. Jump to the top of the red snake, but go towards the screen to find two Red Orb Chests and a Phoenix Feather.
Go back and forward, then jump down to the blue snake. There's a Red Orb Chest where you land, and if you go towards the screen all the way, you'll find another Red Orb Chest and a Gorgon Eye. Go back to where you dropped down and take the short slide, jumping off at the end and grappling onto the wall.
Climb up, jumping to the next area and continue climbing until you come to a grapple point. Do that and then grapple to the next point, where you need to slam through the wall. Once you do, you'll be thrown right into another slide, so make sure you jump and grapple when prompted. Kill the enemies here, then grapple to the snake in the background.
As you climb this snake, you will be stopped and have to grapple to free the clamp holding it. As you're riding the snake, some QTEs will happen, so make sure you're paying attention. When you land, destroy the eggs and enemies that spawn, then go forward and take the short slide to a jump and grapple.
Climb the wall, grabbing the health/magic if you need it, then go to the far end and double jump to the right to land on a ledge. Go to the left end and climb up to the top, then move to the left. At the end, jump and then grapple the green spot, making sure you hold R1. Time it right and jump towards the next grapple point, making it all the way to the end, where you'll slide down an ice wall.
You'll fight some enemies here in a rather small space, so be careful to avoid damage. There's a Blue and Green Chest here, though, should you need it. After the enemies are dead, go to the end and grapple to the wall. Here, climb to the top and grapple there to grab onto the clamp and free it. The snake will bring you to the Ice Caverns.
