Spooky Zanni Mask

Spooky Zanni Mask are a superior-quality style item unique to the 2012 Halloween event The Witching Hour. Use of the item unlock a face style of the same name.

Source
Spooky Zanni Mask is awarded for completing the All Hallow's Peeves collection.

Style unlock
Using the item unlock the Spooky Zanni Mask face style.