Shape Mastery
The Beast within your blood is so fierce that it cows others, forcing their inner rage to retreat from the onslaught of your primitive dominance. With but a gesture, roar, or other primal show of superiority, you can cause someone else’s Beast to draw back and her physical form to revert to its normal state.
System
Spend 3 Blood, expend your standard action, roleplay a show of dominance (a roar, a vicious glare, or other predatory gesture) toward your target, and make an opposed challenge using your Social attribute + Survival versus the target’s Social attribute + Willpower. If successful, you force yo ur target to immediately return to her natural form. Further, she cannot change shape for the next hour.
Shape Mastery reverses the effects of a transformative power , such as Shape of the Beast, Black Metamorphosis, or Horrid Form. It cannot effect powers that alter only a small portion of the body, such as Feral Claws, or powers that alter the body but are not transformative, such as Earth Meld.
Source book: MET - VTM - Core Book