Thrayir, Eyes of the Siren

Coming in Patch 11.0.7.

In a fit of rage and despair, Thrayir conjured a storm that would ravage the land and annihilate Cyrce's enemies. After nearly ten thousand years, the seafury tempest continues to roil as an echo of his power.

Riding Requirements:

Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Notes:

This stormy, night-blue crow has existed in the database since early in Patch 5.4, but was only finally added 6 expansions later - in Patch 11.0.7!

It can be earned by finding 5 unique Runekeys around the Siren Isle and returning them to the Forgotten Vault, where Thrayir's body lies (inert). Most of the Runekeys can only be obtained while you're in the Special Assignment / Storm phase of the zone, which you can access by first completing the zone's weekly quest, Serpent's Wrath and then talking to Suzie Boltwrench in the main quest hub.

The Runekeys can be obtained around the Siren Isle in the following ways:

Cyclonic Runekey: drops from Zek'ul the Shipbreaker in the Special Assignment / Storm phase (Deadfin Mire - around 33.2, 73.6).
Thunderous Runekey: can be assembled from 5 Thunderous Fragments. These can be obtained (randomly) from treasures and chests around the isle (any phase) and also from Seafarer's Caches which can be found in the surrounding waters (non-Storm phase) after you've received the 'Blessing of the Seadweller' buff by completing the zone quest, Dipping a Toe.
Torrential Runekey: has a chance of dropping from any NPC in the Special Assignment / Storm phase.
Turbulent Runekey: can be assembled from 3 unique Turbulent Fragments. which are all found in the Special Assignment / Storm phase. These can be obtained: (i) a dirt pile in the garden of an old inn, around 38.2, 51.8, by a ghost; (ii) a small crystal by a ghost inside the Rotting Hole cave in the south-east, around 67.1, 78.4; a small crystal in the hands of a ghost in the Spirit-Scarred Cave, around 52.4, 38.6.
Whirling Runekey: drops from Ksvir the Forgotten inside the Forgotten Vault in the Special Assignment / Storm phase (Deadfin Mire - around 33.2, 73.6).
Once you've obtained all the Runekeys, head to the Forgotten Vault (entrance around 38.2, 51.8) and interact with Thrayir's body to revive it.