"He is the armor clad, energy, whip wielding specialist, Whiplash! The most loved villain ever battled in Iron Man 2. Recreating an Arc Reactor based on his father's design and building armor ...

Whiplash was Iron Man’s main antagonist in Iron Man 2, ... Howard Stark, co-created the arc reactor, a renewable energy source, before Anton was deported to Siberia.

In newly released concept art, a look at the arc reactor which Tony Stark had been using to power his Stark Industries plant in 2008’s Iron Man has been revealed and it looks a bit different.

The arc reactor is made of palladium, but this isn’t necessarily realistic. It may, in fact, be a nod to a failed line of research, Paul Martin of Spitfire Research tells Inverse.