After the quest updates, teleport back to the first floor of the Killing Intent Tower and continue exploring. There are stairs inside the tower that you can ascend.
After going up the stairs, look to the right. We'll squeeze through here.
You can obtain enhancement materials inside.
After collecting the materials, turn back and head to the other side. There's an enemy blocking the path on that side; it may rush forward and self-destruct. If it doesn't self-destruct, weaken it, and it will eventually explode anyway.
After defeating it, you can climb up on the left side ahead.
There's some Dust on the left that you can pick up.
After picking it up, continue moving to the right, staying close to the right wall. You can find a book at this location.
Come over and pick up the book [Mystery of Killing Intent Modification #2: Killing Intent Modification].
