Fierce Fold acts as a puzzle barrier between Outer Terra and Dripstone, and is therefore the first half of task #7. It is made up almost entirely of force fields, floor traps, and teleports. The main monster found in Fierce Fold is a Shambling Mound.
"Zelphon Ki created this maze of fierce folds to protect the rebels. Try and find the right path that will lead you to the rebel village of Dripstone." - In-game description