In the cave, the fire elf ring is mainly used to spray the cable to energize the cable to open the door, but there is a time limit, and some need to pull down the switch on the wall first. In a narrow passage, you can go through the wall on the right and step on the mechanical device on the ground to open the passage. The front cable needs to be sprayed several times in succession to get a longer power-on time. There is also a wire in the middle, as if there is not enough power to rush into the left door. In fact, the wall on the right can go through, and it needs to be sprayed several times in a row, and then it will enter the door on the right as quickly as possible. Here, you will find that you can't go left because there is an invisible wall. Pull down the wall and come back. The wall on the left is open. You can enter the door on the left by energizing the cable inside. At the memory point, there are three lines: left, middle and right. You should spray the right cable several times first, and then spray the middle cable immediately.

(Just stand between two cables, because 1 2 cable requires a short interval, so it is too late to run between 2 and 3), so you can increase the current, then spray the cable on the left to increase the current, and you can run in the door.

Here's a video, just take a look: