Celtic Rock

 is a rare base item.

Obtained from
The item is available from the following vendors during the St. Patrick's Day event:
 * Pot O' Gold (Vendor) in the Watchtower
 * Pot O' Gold (Vendor) in the Hall of Doom

Feats

 * Rock Collector: Collect all 6 Celtic Rock Base Items from the 2017 St. Patrick's Day event (10 Points)

Trivia
The item is only available during the St. Patrick's Day event.