Verteig is very rarely depicted in most artwork, since their is a certain stigmata among the living about glorifying the dead. He also cannot exist in his true form outside of Stertox, the realm of the dead, and instead mostly interacts with the world of the living through his servants. When he does appear in the mortal realm, usually to take those of importance personally to the underworld, he appears as a tall, reedy figure wearing garments made of a dark-colored material and bronze armor. He has no exposed skin, and only his blank white eyes can be seen under his bronze horned helmet. He usually carries a long pike with him in the rare instances when he is seen.
Since Verteig's presence in the mortal world is purely ethereal, his body can become the consistency of smoke at any instant he chooses, thus any physical attacks are useless against him. He can also deliver a curse of lingering death to anyone he touches, necessitating the full coverage of his body.
Optical, since I deal with the underworld, do you mind if I create some lore on the subject?