It is not known how to get some of the appearances, so I'll update when I find out.You can see what each color looks like by visiting. I'm going to go over all of the known ways to get hidden appearances so far. Almost anything that is screwing you up (valkyries, Fel-pool, Bladestorm, Runeseers one shot cast while he's in the bubble) can be.
As an assassination rogue you should really be using Feint, as much as you can. An assassination rogue perspective of the 7.2 mage tower challenge. WoW character's portraits and commissions drawn by me.
