I'm thinking the Dragon is something of the Mortal Sword of the Creator, but I can't decide if Nae'blis is a Destriant, Shield Anvil or Mortal Sword. Does the latter apply to a guy who doesn't age anymore? What exactly, would being the Shield Anvil of Shai'tan entail? Or maybe he's one of the cards in High House Shadow (the WoT Deck obviously has a different meaning for that House)?

High House Shadow (WoT Deck)
King (Shai'tan)
Queen
Hand (Shadar Haran)
Nae'blis (Moridin)
Herald (Narg)
Strong-arm
Eyes-and-ears
Beggar
Light-skirt (Isendre)

High House Light
King ( *crickets chirping* )
Queen (DON'T EVEN THINK IT, fionwe1987! )
Champion (Rand al'Thor [post tGS] )

High House Dragon
King (Rand al'Thor)
Queen
other Queen
wait, what? three Queens? really?
Captain-General (Mat Cauthon)
Aes Sedai (formerly Moiraine, formerly Cadsuane, now Nynaeve)
Gleeman (Thom Merrilin)
Soldier (I'm gonna go with Uno)
Silk Washer (Faile)
Smith (Perrin Aybarra)

If you don't get this, go read Steven Erikson's Malazan Book of the Fallen, where it is all made clear...no wait, I lie. It's never made clear. But read them anyway, because, what the hell, why not?