From Guild Wars Wiki
The Lupine Mask is a festival hat obtained from Mad King Thorn, in Kamadan, Jewel of Istan, during the Halloween 2008 event. Since 2012, it can also be obtained by exchanging one Ghoulish Accessory Token with Aahtan during Halloween.
- Cannot be dyed.
- The Lupine Mask has a fixed size and will not change based on the character's height.
- "Lupine" means characteristic of, or relating to, wolves, from the Latin "lupus", wolf.