The vehicle is covered in weird gargoyles that constantly chatter incantations and frequently exhale great gouts of Tzeentch warp fire. This covers the vehicle in a sheet of sorcerous warp flames that consume enemy troops. Any enemy models making a close combat attack on the vehicle suffer a single hit just before they attack the vehicle. The hit has a Strength of D6 and an AP value of 4.
Coruscating Warp Flame
Source: Codex: Chaos Space Marines (1999), p. 21