The Heart of Onarix

The Heart of Onarix is an Act 7 side quest, offered by Sagon in the Vanguard of the Three after completing In Service of Solael.

Objectives

 * Obtain the Eye of Ekur
 * Activate the Altar at Burning Spire
 * Acquire the Heart of Onarix
 * Bring the heart to Sagon at the Vanguard of the Three

Guide
Sagon will give the player the Eye of Ekur quest item, previously handed to Raiken during the Eye of Ekur quest. It can be taken to the Burning Spire, a raised area a with an altar a short way north-east from the Vanguard of the Three.

Placing it on the Altar of Abyd will open a portal to the Bloodied Wastes, a Chthonic Void area. There, Onarix, the Razorhide can be found and slain. he will drop the Heart of Onarix quest item, which can then be returned to Sagon.

Rewards
Sagon will then offer the Tomb of the Eldritch Sun quest.