The circumstance in which the user's strength is dependent on maintaining a certain emotional state. Variation of Psionic Strength.
The user's power is dependent on maintaining a certain emotional state (fear, anger, etc.); should these states be undermined, the user may become weaker and easier to neutralize. This may also be affected by feelings and moods.
In several cases, this can also apply to others' emotional states, which the user draws power from.