Board Thread:Theories and Rumors/@comment-34917389-20180709190600/@comment-35089293-20180711141705

WinterholdCoastGuard wrote: It's probably something like sand or dirt because they are brown colored related, well sand is more tan color but those are the only things I could think of

Unless it's something like stone, crystal, or plasma but I doubt they give him something like that

Actually, stone is very much like metal, which is Karlof's power. Crystal would be a light blue (it makes sense, I guess) and plasma would be a purple tone.