Originally, Heyu thought he could just drop the small mountain and be done with it. However, after careful consideration, he realized the sword domain was smaller than the mountain, so he decided to hollow out the mountain and fit the sword domain inside.

"Perfect."

Heyu admired the small mountain and praised it.

Now, he just had to wait for Luo Qingyi to find the right time and place, and then he could drop it.