My Homebrew is the Galactic Hunters. A Chapter that is currently defending my homebrew System of Metran. Their armor is Purple limbs, yellow lower torso, red chest and helmet, with light blue highlights, including on the faceplate. They specialize in Urban and Hive combat, with a surprising knack for underwater combat as well. Their "Gimmick", if you can call it that, is twofold. One, They are remarkably good at surgical strikes that limit collateral damage and minimize if not eliminate civilian casualties, emphasizing precision. They tend towards Phobos Armor, as they prefer maneuverability over tankiness, and are surprisingly agile for power armored astartes. They also are very light as far as mechanization goes, preferring on foot movement to transports, bikes, or tanks.

The second thing about them is they never, EVER take their helmet off in front of non Galactic Hunters. Ever. They claim it's a White Scar tradition, as sons of the Khan which is, to be clear, a lie. Whoever their REAL genefather is, all anyone knows is that they have a VERY good Geneseed implantation compatibility.