The progena who graduated to the 33rd Deltic Phoenixes were originally orphaned by a vicious Dark Eldar strike upon Kaldamor. Though mindscaping has eliminated their knowledge of this event, the Scions of the 33rd Deltic Phoenixes have statistically proven to have a greater kill rate against this particular type of xenos. The 33rd Deltic Phoenixes' greatest hour came upon the twin moons of Erendix. A series of raids led by Archon Vaxmar of the Kabal of the Emerald Talon had crippled dozens of Imperial settlements, and numerous high-ranking officials had been taken back to Commorragh to be experimented upon by the Haemonculi Covens. The 33rd Deltic Phoenixes were scrambled to Erendix, where they awaited the next realspace assault. When it finally came, it was upon the most populous of the moons.
The Scions stormed to the surface as separate, multiple fast-response squads, and their speed, tactics and technology enabled them to shred through the ranks of Kabalite Warriors, while their Taurox Primes destroying Raiders and Reavers without mercy. Segmentum command was greatly impressed by the speed and precision of the Scions' attack, and the 33rd Deltic Phoenixes have since been called upon whenever these deadly xenos have been sighted. But Archon Vaxmar, who survived the conflict, has not forgotten the destruction of half his Kabal. The embittered Dark Eldar follows the movements of the 33rd Deltic Phoenixes with great interest, and works to arrange a sufficiently painful revenge.
The 33rd Deltic Phoenixes bear the symbol known as the Infernum Ressurectus. Depicting a heavily abstracted phoenix set against the divided remains of a shattered world, the symbol evokes the Scions' rise from the fate of their ruined home world.
- Codex: Militarum Tempestus (6th Edition), pg. 30