Constructed in-place (materialization or assembly, the latter is harder to animate but way cooler)
Lasers
Red laser is for the weak, has long wavelength (= low energy). Give us blue/purple lasers!
Can have speed of light OR be slowed down by emitter (see upcoming 3D model)
Purple lasers are lethal and can be used to (willingly) damage things, whereas blue ones are not (both can be, of course, used to activate laser receivers)