Biconcavic Lens of the Focusing Iris

The Biconcavic Lens of the Focusing Iris could be purchased for 75 Titan Residuum from Thaumaturge Vashreen in Boralus or Dazar'alor after completing Battle for Azeroth Keystone Master: Season Three.

Infusing the item at the Heart Forge will grant Rank 4 of Essence of the Focusing Iris Essence and leave behind a Cracked Iris Lens.

Ranks

 * 1) Converging Lens of the Focusing Iris
 * 2) Magnifying Lens of the Focusing Iris
 * 3) Stabilizing Lens of the Focusing Iris
 * 4) Biconcavic Lens of the Focusing Iris