Ghoul form

[tobtej]

So..last night..while on bg..i noticed i got a buff.. " Ghoul form " ..it's pretty sick :D .. but i dont know how i got it ..anyone know which a spell that can transform other players into a ghoul ?
Its not that i dont wanna make it disappear ..i love it..it looks sick :D and good camouflage !! but i'd like to know how i got it...
i was thinking a minor glyph from Dk's ? but i dont know if they have such glyphs
http://i.imgur.com/rOuF0WS.jpg
http://i.imgur.com/oWM5XcI.jpg

[Gobarz]

I too wanted to know, I've seen a guy lurking Outland like this and fled as soon as he saw me. It's sick, but yet, mysterious, making my curious.

For a second, I thought warmane attempted this in secret when I saw, so I ran too:
https://www.youtube.com/watch?v=cqp86JngGcY

[skullatbash]

https://mop.openwow.com/spell=3287 I guess

WoWhead link http://www.wowhead.com/spell=3287/ghoul-form