Starfrost

''"For revealing the traitor, Governor Cyril Vinticae gives you the Starfrost, a magical frost which focuses the prayers of Dawnstar and the power of elemental winter through the user. With this power you just might win. To battle!" -- Text shown when the traitor is revealed''

Starfrost is an item given to you in The Elder Scrolls Travels: Dawnstar if you succeed in finding the traitor.