Hallow's End - Blasted Lands Candy Bucket

So erm.. there's an achivement "trick of treat easter kingdoms" which require you to visit some places and get a pumpkin there.
one of those places is blasted lands - nethergrade keep.. which is atm umm.. occupied by Iron horde and place doesnt even exist I think.
this achi is part of bigger achi, and that bigger achi is part of even bigger achi, and its impossible to complete.. so erm, suggestions?