Ferrus Manus

The Gorgon, Primarch of the Iron Hands, killed by his brother Fulgrim.

Ferrus Manus, called "the Gorgon", was the Primarch of the Iron Hands, the 10th Space Marine Legion. He grew up on the harsh world of Medusa, where the clans named him Ferrus Manus, High Gothic for "Iron Hand". His hands were covered in a living metal, and a master smith, he shaped molten metal with them without hammer or forge.

Quick Facts

Title: The Gorgon
Legion: Iron Hands (X)
Homeworld: Medusa

Facts from the source article.

Background

He forged his closest bond with Fulgrim, Primarch of the Emperor's Children; each made a weapon for the other, and Ferrus gave Fulgrim the burning sword Fireblade. When Fulgrim fell to Chaos, that friendship ended in tragedy: in the Dropsite Massacre on Isstvan V, at the start of the Heresy, Fulgrim cut off Ferrus's head with a daemonic sword.