Introduced during the Masked Memories event.
You give Ulgrim the Unpleasant Casting Stein.
Ulgrim the Unpleasant tells you, "My Stein!! You should be rewarded!"
Ulgrim examines the stein, eyes widening in horror.
Ulgrim the Unpleasant tells you, "It's not even full of Stout!"
Ulgrim the Unpleasant tells you, "Well, I guess I can give you something, and I should get rid of this before he comes looking for me..."
Ulgrim the Unpleasant gives you Asheron Mask.