From Warhammer 40k - Lexicanum
Acrion was a Captain of the Blood Angels.
During the 7th Black Crusade, Acrion commanded the massive Blood Angels host that attempted to stop the Black Legion on Mackan. However, in a duel mimicking the infamous confrontation of Horus and Sanguinius during the Horus Heresy, Acrion was killed by Abaddon the Despoiler.
- 1: Black Legion - A Codex: Chaos Space Marines Supplement (E-Book), "The Ghost War"