Brainiac
Super Freak
Most I've read say liquid metal. I don't mind it, the poster Ultron's are good enough for me, and it may still get a figure even if it is liquid in appearance
and many many many many drones ........
Virginia 'Pepper' Potts: "Yes, I would like an Ultron....... with drones, a lot of drones. Like, at least three drones."