From Destinypedia, the Destiny wiki
Praedyth was a Warlock who had been part of Kabr's fireteam during their assault on the Vault of Glass. Praedyth himself was believed to be a myth; Praedyth's Timepiece and Praedyth's Revenge were the only pieces of evidence of his existence until the Vanguard discovered a message coming from the Vault.
His fate is explored in the Story Mission Paradox. After fighting through Taken, the Guardian discovers Praedyth's corpse, long dead, trapped deep within the Vault of Glass. However there is evidence that in another timeline or reality or even in an isolated space Praedyth lives.
If a secret area in the Paradox mission is triggered as the Daily Heroic, it is revealed that Praedyth still exists across alternate time streams, and that he originally worked for the Future War Cult using a custom made Ghost shell, known to players as the Intrusion Shell. His spirit implies that he was one of the first Guardians to discover Oryx's power to Take through what would eventually become his transcendent powers, as she (his Ghost) claims she saw the Darkness "wear a Fallen Captain like clothes," implying that it was Taken.
A Fateful Raid
Trapped in the Vault
An Uncertain Fate
List of appearances