The Masquerade

The Masquerade is related to the seasonal world event Hallow's End. Completing this achievement is criteria for the meta achievement.

Locations
Hallowed Wands can be found within Treat Bags, a reward from Trick or Treating with innkeepers, and Crudely Wrapped Gifts, related to the seasonal daily quests:

Note that Hallowed Wand - Random transformations will not give credit towards the achievement, as of the Hallow's End event in 2008.