There are many battle-related achievements in "Light and Shadow: Expedition No. 33", and the top-level processing achievements are one of them. It is very simple to do this achievement. Xi'er can consume 20 layers of a single target during the twilight period. It will be better to have the "Huang Man Scythe".
How to deal with the top-level achievements of the Light and Shadow 33 Expedition Team
Top processing
Xi'er consumes 20 layers of a single target during the twilight period
Simple, it will be easier to do after having the "Huanghunting Scythe".
The following is the unlocking method without "Huanhe". First, use the output of "Preview Gathering" with a prescient skill to give a very fleshy enemy 10 layers of prescient, and then use the non-damage Lunar Moon skill like "Shadow Wash" to let yourself enter the "Twilight" state.
This state will last for two rounds, in which the first round uses a scorching bond on an enemy with 10 layers of presight to ensure that the opponent has 20 layers of presight to the opponent. Then in the second round, use "Twilight Slash" to attack the enemy and consume all presight to unlock.