The Dragon's Eye jewel held by the Mother. It is one of the four jewels that, added to the stone fragments held by the Magical Races, make up the Stone Disk. When April learned to Shift of her own accord, she went to the cliff she had dreamed about and found the Mother weakened and dying from her battles with Chaos. The Mother tells April 'take my jewel eye', quickly, before she dies. This suggests the Dragon's Eye jewels are linked to the Draic Kin organically.
Obtained from the Mother.