Quirk Amplification Device

The Quirk Amplification Device is a support item invented by David Shield.

Description
In order to restore All Might's power, David and his assistant Sam researched for years to develop equipment that could revitalize Quirks. They eventually invented a support item that could exponentially increase the power of the user's Quirk without directly affecting the body. This meant the user's Quirk could be enhanced without the negative side-effects of drugs like Trigger.

The device proved to be so dangerous that sponsors at I-Island confiscated it and its research and locked them away. David and Sam went to extreme lengths to get the device back, staging a villain attack so it could be stolen and returned to them, only for Wolfram to betray them and keep the device. The extra boost to Metal Manipulation allowed Wolfram to greatly extend the reach and power of his Quirk, and combined with his enhanced muscle Quirk, Wolfram could even overpower an exhausted All Might.

The device itself is a sophisticated headset. It was destroyed after Wolfram's defeat.