This is one imbaly cool bug I discovered. Some one in an heroic gave me this wisp costume buff. and I pressed feigndeath! And it has this real cool result.
Step 1!!!: get a wisp costume
Step 2!!!: use Feigndeath
WIN! you are now isvisible and no one can target/click you. Except want they typ /target:P Have fun with it.
Tested and worked in pvp.