The Netbook of Witches and Warlocks
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Full netbook can be found on the followng website
This appears to be a normal Talisman. Once per day it can be used to create a large, swirling motion of colors directly above the wearer. Anyone who views the swirling must make a will save (DC 11) or come under the effects of a Vertigo spell as cast by a 5th level sorcerer.