Siberys Dragonshard

a Siberys Dragonshard can be used (with a pile of gold) for feat respec at the mindflayer in house J

a Siberys Dragonshard can be created by merging 10.000 Siberys Dragonshard Fragments in the Stone of Change

a Siberys Dragonshard can be chosen as the reward for 75 favor Agents of Argonnessen