There is no mask in the viking show everybody exactly what they are. They carve like grooves into their teeth and then fill them in with ink or other color um some of the members of certain brotherhood see this is all the stuff that's just made for hollywood isn't it teeth grooves but here's the part i always try to remember this isn't a specifically viking thing very little of this is specifically scandinavian stuff  the vikings are as i may have already said to me i see them like the american bison the buffalo.