You can transform into and manifest materials to create machines you understand or tinkertech specialties that you have out of your own body. While this harms you, you also have a minor regeneration power to keep you alive.
You will have a link that enables you to control any machine that is made from you within 1 km, although you can make relays to extend this range as well as fuse with them as long as they are in touching range. This doesn’t come with multitasking abilities.
This synergizes well with other tinker powers. Note that without some kind of regeneration power, this can be extremely risky.
Examples of uses for this power are making metal spikes extrude from your skin for combat or vomiting molten metal to forge. More advanced uses include creating entire machines, such as robots (either from understanding their materials, systems, and mechanics or from a tinker specialty), directly rather than just creating the materials, but doing this is harder, riskier, and even more painful.