Be empowered by fear.
The power to be
strengthened by the fear of others or oneself. Sub-power of Fear Manipulation. Variation of Emotion Empowerment.
Users become stronger, faster, more durable, etc. through fear of oneself and others, possibly unlocking abilities related to the affinity and enhancing the existing powers. Some users may be able draw sustenance from fear or even slow or stop aging.
May be rendered powerless in the absence of fear.
May become overwhelmed with fears
May only be able to draw on others' fear.
Empathy users or Telepathy users may overwhelm user with emotions opposite to fear.
Sinestro Corp (DC Comics) feed on fear to empower themselves.
Harvesters like Ian Stone (The Deaths of Ian Stone) can feed of the fears of humans or else they'll starve and get weaker.
Sadao Maou (Hataraku Maou-sama!) can access his demon form through the fear of humans.
The Serpent (Marvel Comics) feeds on the fear that his Worthy instill in humanity, all over the world, ...
... until the fear of all of humanity made him powerful enough to perform virtually any feat.
Horrificator (Miraculous Ladybug) grows bigger and stronger the more fear she stirs in others.
The Bye Bye Man (The Bye Bye Man)
Pitch Black (Rise of the Guardians) is strengthened by the fear of others.
Charlotte Linlin (One Piece) effectiveness in absorbing life is dependent on the victim's fear, the stronger their fear the more vulnerable they are to having their life drained.