For those unaware, the Coldwind Skull quest is bugged. The last quest needed to get your Orsinium Costumes. Basically, when you try to complete the puzzle, you have to pick up 1 of 4 items, and place them correctly. In the quests current state, when placing an item correctly, you are not able to pick up a second item, and you're stuck. After a few tests, I found out, with 2 people in the group, you can each pick up one item and place them correctly. So I tested with 2 people and got 2 items placed. Then I tried with 3 people in the group and we got 3 items to be placed before the quest broke. I haven't been able to find a 4th Hero of Wrothgar to test if it will complete the quest with 4 people. But I feel it's a real possibility. Come join us in the NA PC servers to get this quest finished and get the costumes you deserve!

Update: Me and 3 others managed to get this to work by having each person grab a different item in the room and placing them all correctly. The game will give you the rest of the items needed in order to complete the quest!