Fear Shifting

Principles:
By releasing a telepathic wave, the user can transform into the target worst nightmare.

Depending on the type, it may be real or illusion.

Real one will cause one's body to shapeshift into the target's worse nightmare and gain new powers along with it. Only by changing their target will the form change.

Illusion create an illusion over one's body which will affect everyone to see their worst nightmares.

Weaknesses:
Real version weaknesses is that it only affects one target at a time, and if the fear is too weak it may cause the fear to disappear.

Illusion version is that it does no real harm except mentally.