Rage Power

Disclaimer
Taken directly from VS Battles Wikia.

Introduction
Ability to gain strength from anger.

User becomes stronger, faster, more durable, etc. through anger, rage, hatred, and vengeance whether their own or others, possibly unlocking abilities related to the affinity and enhancing their existing powers. Some users may be able to draw sustenance from the anger or even slow or stop aging.

Drawbacks and limitations

 * Application may be uncontrollable
 * May be not possible to activate it at will
 * May be limited by the amount of anger they can harness.
 * May lose control when angered, causing harm to even allies.
 * May snap out only by outside forces or lengthy periods of time in peaceful environments.
 * May be difficult to snap out of rage-filled trance.