Go to the southeastern section of H-6 in Yorcia Weald and click the Wavering Flux for a cutscene.
After the cutscene, click the Wavering Flux again to enter a battlefield in Yorcia Weald (U) against Ashraak, a Xol.
Your Sky blue pome is lost upon entry. If you lose the fight, return to the aged stump in Leafallia to get a new one.
You are assisted in this battle by Morimar. If he is defeated, the battle is automatically lost.
Alter egos can be summoned in the battlefield. However, Ashraak is able to inflict AoE Silence and several other enfeebling effects, so a dedicated healer played by a human is recommended.
Go to the northwestern corner of K-11 in Cirdas Caverns and click the Wavering Flux for a cutscene. This is near the Sih Gates zone, but it may be faster to take the Augural Conveyor warp and walk through Cirdas.