From Lexicanum

Gorechild is a huge chainaxe and is an artifact from the Great Crusade. Its teeth come from the jaws of mica-dragons of the death world Luther McIntyre IX, its haft forged from adamantium and its head is a full three spans across¹. Originally wielded as a pair by Angron along with it’s twin Gorefather², it is now used by Khârn the Betrayer.

Sources

• ¹:Codex: Chaos Space Marines (4th Edition) page 48 - 49
• ²: Battle for the Abyss, (Horus Heresy Series) by Ben Counter, p. 266