Sarlock
From Warhammer 40k - Lexicanum
Sarlock is an Iron Father of the Iron Hands Chapter. He conducted the successful operation to repair the ravaged body of his Battle Brother Gaumech, with augmetics; after Gaumech was heavily injured during the Iron Hands' defeat of a Chaos Cult rebellion, on the Hive World Gantor Terentes.He was more machine then man; the whole left side of his face, his right eye, both legs and inevitably his left hand where bionic.[1]
Source
- 1: Index Astartes III pg. 10