Petruccio's Feather is an achievement that requires the player to find and return Petruccio's feather in Senntisten.
The feather is found in a barricade, under a sack, north-west of where Commander Zilyana is standing in Senntisten, two floors down.
It can be returned to a chest which can be found in a building just west of the feather's location.
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- The item is a reference to Petruccio Auditore da Firenze from Assassin's Creed 2, who started a sidequest to retrieve feathers.