Captain America: Hydramobile Key The key to the Red Skull’s “Hydramobile.” “Not a scratch.” And the hero prop: You can see in this CG concept art below that it was originally intended to have three prongs: Advertisements Share this:EmailPocketPrintShare on TumblrTweetLike this:Like Loading... Related Author: Staff Writer Thirty-something graphic designer trapped in a boring part of Florida. View all posts by Staff Writer