Name: Rhythmic Lock

Effect: User plays music through headphones or speakers, and anything within range of the sound can be vibrated to a certain frequency. For example, if the user were to utilize this Quirk for villainy, then they could play a certain song and disrupt a heartbeat by slowing it or speeding it up to the point where the heart ruptures, or blood ceases to flow. For heroism, possibly disrupting the cycle of an engine's pistons, and forcing them to move to the beat of a song, rather than their usual cycle, or stop entirely. Can also be used to force people and objects to move to the rhythm of the song.

Appearance Changes: None, until the Quirk is activated. When the power is active, the ground cracks, and the tempo transfers to the ground, causing the ground within a foot of the user to rise and fall with the beat, and appearing as though the sound waves have taken on a physical form. Can cause earthquakes if used on a large scale. 

Pros: Relatively diverse Quirk if used correctly, can be used to help people in a variety of ways, from teaching them to move with a rhythm, to stopping a building from falling on people, and the ability to lead them out safely. 

Cons: If the user's tempo is disrupted, the ability with either notably weaken, will deactivate entirely, or user will lose control and wreak havoc on anything nearby, depending on the sounds being played. 

Backlash: User will tire after a certain period of time, and if use continues, will become temporarily deaf. If use continues even further, then destruction will follow, as the user can no longer follow the rhythm. 

Training options: Dancing, as this increases endurance and helps follow the beat. Attempting to push limits a safe distance from a city. 

Notable Users: None.