If you were a qwaser what would be your element under your control, if I had to pick I would have Oxygen, Carbon, Hydrogen or Tungsten
They all have something cool I would like to use. If you want you can also include how you would use the power.
Oxygen- No brainer, take out oxygen, beat down any metal user, make fire, control water and blood.
Carbon - Make diamonds and burn stuff with it
Tungsten - Use it as anti-armor projectiles or railguns
Hydrogen - Make control solar flares