For a supernatural being, having their powers sealed is extremely terrifying, just as if in battle, when facing an enemy armed to the teeth, a warrior suddenly discovers their weapons have failed. What comes next can be imagined, one would undoubtedly be crushed until they question their life choices.
Ye Fan smiled slightly; this was the effect he desired. To make a strong person submit, one must confront and then defeat their strongest aspect, thoroughly and utterly. Now, Ye Fan had done just that. These supernatural beings relied on telekinesis, and as long as he sealed their telekinetic powers, they would be helpless, like lambs to the slaughter.
It must be said that these supernatural beings were quite skilled in using their telekinesis, coupled with their mutated body structures. For Ye Fan to seal their telekinesis was challenging. If their strength was close to Ye Fan's, he wouldn't be able to seal their superpower and could only cause interference.