Sh9 The Omnimatrix-the most powerful weapon

The Omnimatrix, better known as the Omnitrix, was a watch-like device that attached to Ben Tennyson's wrist in the first episode of the series, and is one of the devices that the franchise revolves around. The device allowed whoever wore it to alter their DNA at will, and transform into dozens of different alien species, each with their own unique abilities.