Approach the new tunnel network and head inside. Jump the debris and fight the Rust Puddings and Centurion battling amongst themselves. Two Cryohedrons and a Centurion are found a little further ahead and they guard an Ice Charm . Beyond this, a couple more Rust Puddings wait after which is a large bridge to cross where you can also see a Juggernaut prowling on the other side.
Turn right after you cross the bridge to a dead end with a Particle Accelerator then return and confront the Juggernaut if you’re feeling brave. There is no treasure up here so you don’t need to fight it if you don’t want to. Save if you wish then go right once more into the next group of enemies. Don’t be caught out here; make sure to kill the Cryohedrons first before they cause havoc.
Across the bridge and up a ledge to the north lies a Sphere with 3x Crystal Oscillators and just down the stairs are more Cryohedrons. Further along is another three-way battle between Rust Puddings (these little flans get into a lot of fights, don't they?) and Cryohedrons. Lastly, down a set of stairs immediately after the battle you will find 3x Perfect Conductors just before the next area.