This would be more terrifying than anything else. The first likely candidate to be a Decepticon on this list is Dr. Arliss Loveless' giant mechanical spider. Seeing it appear on the horizon in the Wild Wild West movie was a very fearsome and daunting sight. Knowing that it had a life of its own would be scary as hell. A steampunk Transformer would be beyond cool and a Decepticon of this size would make for one hell of a battle for Optimus Prime and friends to deal with. Alignment:Decepticon.Potential Transformer name:Octobot ('Arachnid' would be too similar to 'Airachnid' and, as much as that name sounds better, that name already exists in the world of Transformers!).