Thunderoc Feather

Thunderoc Feather is a treasure.

Source
Thunderoc Feather can be found as a collectible in the following area: It can be obtained as a drop from the following creatures:
 * The treasure spot marked on the map in the Ravatoghan Trail, east of the Ravatogh Verinas Mart and west of Lambath Haven.
 * Copperoc - 75% chance
 * Thunderoc - 75% chance