Mercutian was a member of the Night Lords. Initially of 7th Claw during the Horus Heresy, he ended up under the command of The Exalted of First Claw. He went on to follow Talos Valcoran after The Exalted's sacrifice against the Red Corsairs. Mercutian favoured a Heavy Bolter in combat and proved loyal to Talos throughout his struggles. Later, Mercutian was killed on Tsagualsa by the Eldar Phoenix Lord Jain Zar during the attempt by Ulthwé to assassinate Talos, hoping to buy time against the Eldar warrior to allow Talos time to escape.
- 1: Soul Hunter (Novel) Chapter 3
- 2: Blood Reaver (Novel) Chapter 20
- 3: Void Stalker (Novel) Chapter 28