From Lexicanum

Hell Blades are aircraft designed to fill the role of interceptors, employed by Chaos forces, including Chaos Space Marines and the more numerous Chaos militias such as the Blood Pact. They are used as fast and agile interceptors, engaging enemy aircraft while the larger Hell Talon fighter-bomber devastates ground targets. In this role they are armed with two twin-linked autocannons.

The Hell Blade has a sleek, slim and deadly form, and is thought to be a product of a forge world in the Eye of Terror. Hell Blades are sometimes daemonically possessed; in other cases they are piloted by a servitor hard-wired into the cockpit.

The Hell Razor class is a variant which was used by the Blood Pact on Enothis.²

Sources

• ¹:Imperial Armour Update 2006
• ²Double Eagle, page 43