Crown of the Triumvirate
The Crown of the Triumvirate is an ancient relic of the eredar, the people of Argus. It was created by the eredar's three leaders , , and thousands of years ago in order to bring prosperity to all. The Crown is composed of three gems - Kil'jaeden's Crest of Knowledge, Archimonde's Sigil of Awakening, and Velen's Eye of Prophecy - and on their own the individual pieces provide little power.
Archimonde kept his Sigil of Awakening at the Conservatory of the Arcane, caring little for the power it provided on its own and using it as a reward for several trials he developed. After Archimonde and Kil'jaeden joined in his Burning Crusade and Velen fled Argus with his new exiles, Kil'jaeden had the Crest of Knowledge locked away in the Seat of the Triumvirate since it was useless without all three pieces. Velen kept the Eye of Prophecy on him for millennia, keeping it close as part of his staff.
When it was discovered that had been resurrected by Sargeras, the Army of the Light sought out the Crest of Knowledge for a power boost. After retrieving it, the Vindicaar changed from purple to gold.