Further ahead is a save point, so save your progress. It's recommended to create an extra save here, as you won't be able to exit once you proceed.
After saving, use the Locking Sickle to climb up. There's a material item up there.
Further ahead is the final boss.
After entering, watch the cutscene with Mu Xiaokui, then head left. You'll see a material item ahead.
Then cross the bridge on the left and keep following the path. You'll encounter many familiar faces along the way.
Save your progress at the save point on the mountaintop.
Save your progress and start the boss fight against "Leng Tu." Leng Tu's combat mechanics are similar to the "Dang Hui" we fought earlier, but he's an enhanced version.
The first few bosses are all ones we've fought before, and they'll have allies helping us fight.
Finally, you'll face his true form. His true form is quite fragile, and his only red-light attack is spitting red threads, which doesn't deal much damage. Just get up close and beat him down.
