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Nuceria was a brutal, unforgiving world run by cruel slavemasters from the city of Desh'ea that forced their subjects to battle in gladiatorial arenas. The aggression-enhancing technology known as the Butchers Nails was a key part of this process. The young Angron was captured and forced to take part in this cruel game until he led a slave revolt. However, at the height of the battle against the slavemasters, he was teleported away by the Emperor, something that infuriated the Red Angel. In the aftermath of Angron's unwilling departure from Nuceria, his comrades were defeated and massacred by the slavemasters, which Angron referred to as the "High-Riders".
Many years later, during the Horus Heresy, Angron returned to Nuceria alongside the Word Bearers' Primarch Lorgar. Upon his return he discovered that the slavemasters had told the planet's populace that he had fled in the final moments of his slave revolt. Infuriated at this lie, Angron ordered the purge of all life on Nuceria, something the World Eaters and Word Bearers brutally carried out.[2a] During the purge, a large fleet of Ultramarines led by Roboute Guilliman himself arrived in orbit over Nuceria and engaged the Traitor forces, eager for revenge for the Battle of Calth.[2b]
As the Ultramarines and their Mechanicum allies clashed with the Chaos forces in the city of Meahor, Guilliman fought a titanic duel against Angron and Lorgar. At the height of the fight, Lorgar triggered the culmination of a ritual that caused Angron to ascend and transform into a Daemon Prince.[2c] Following this, the Ultramarines were forced to retreat.[2e]
- 1: Index Astartes IV, pgs. 35-37 - Chosen of Khorne
- 2: Betrayer (Novel)
- 3: After Desh'ea (Short Story)