I know there is a lot of confusion about this things in the game . Let me explain how i understand this.
Wargs. Forced: if wargs a deal a shadow card with no effect, return wargs to the the staging area after it attacks.
There is another card in the Emyn muil Set:http://www.fantasyflightgames.com/edge_news.asp?eidn=2248
Location and also first location with shadow effect: after this attack is RESOLVED return attacking enemy to the staging area.
So here is quite clear : (after it attack) is one termin and (after attack is resolved) is also another termin. And this is suppose to be two different things.
After attack he get shadow card, no effect and comeback straight away to staiging area (no damage tokens) and after attack is resolved (first put damage tokens than comeback to the staging area). I suppose here is no doubts, otherwise for what we have 2 different termins to discribe same things.
So same with Ufthak and Dol guldor Beast master.Termin 1:after attacks Ufthak get his token straight away after you decide who is defender, and beast master dealt a additional shadow card in this case. Here is nothing about second termin: After attack is Resolved.
But according to this logic if you play feint in the beginning of combat phase on this enemy, Ufthak dont get the the token and Beast master dont get the additional shadow card.
Something like this.Sorry for my English.I try my best.