Alehart
From Warhammer 40k - Lexicanum
Alehart the Slayer was the Emperor's Champion in 997.M41, during the Black Templars battle with Hive Fleet Leviathan in the Shimmering City of Mirlas. In the second battle with the Tyranids, he turned the tide of the war when he slew the Hive Tyrant leading the swarm. Not content with having the Tyrandis on the planet defeated, Alehart then led a small band of his Battle Brothers in boarding a Hive Ship orbiting it. After hacking his way to the ship's core, Alehart drove his Black Sword into the pulsing cortex of the beast, causing its death scream to echo across the system.[1]
Source
- 1: Index Astartes: Emperor's Champion, pg. 8