[[The Citadel Journal 37]] included [[Warhammer 40,000 3rd Edition Rulebook|3rd Edition]] rules for the rare biomorphs of [[Hive Fleet]] [[Harbinger (Hive Fleet)|Harbinger]], several of which would later become published biomorphs including [[Acid Spray]], [[Regeneration]], and by different names, some which could be considered precursors to the [[Venom_Cannon#Heavy_Venom_Cannon|Heavy Venom Cannon]], [[Stinger Salvo]], and the [[Fleshborer Hive]].{{Fn|9}}