The Didact's Gift

The Didact's gift was a Forerunner artifact retrieved by Fireteam Crimson during The Second Battle of Requiem, while they were pursuing Jul Mdama. When Dr. Catherine Halsey was inspecting the artifact, it transmitted memories of the composition of New Phoenix onto several screens in the lab.

Trivia

 * Covenant also refer to the artifact as 'The Promethean Soul'.