Until the battle at [[Signus Prime]] Meros was a simple line-[[astartesAstartes]] of solid if unremarkable service. During a war against the [[Dark Eldar]] on [[Nartaba Octus]], Meros was assigned to [[Task Force Ignis]], a Blood Angels flotilla overseeing the evacuation of the human population of the planet before it was subjected to [[Exterminatus]]. Part of the last group off the planet, the [[Stormbird]] Meros was riding in was shot down by a [[Soul Seeker]] round and Meros slipped into a poison induced coma. In an attempt to save the injured apothecary, Sergeant [[Sanguinary Guard]] Captain [[AzkaellonCassiel]] and Brother [[First Captain]] [[RaldoronSarga]] placed Meros in one of the exsanguinators, the blood coffins used in the Blood Angels neophyte transformation process. The intent was to drain the poisoned blood from Meros and replace it will fresh, clean blood. During his time in the exsanguinator, Meros met Brother [[Rafen]] through a genetic link they shared and who has in the same exsanguinator, albeit ten thousand years in the future. The two quickly came soon found that they were not alone, encountering the [[Sanguinor]]. Unable to blows when believe what he was seeing, Rafen told pulled his bolter on the mysterious entity, and Meros , assuming that the Sanguinor could only be [[Sanguinius]] himself, tried to stop him. When Rafen told Meros that Sanguinius had been dead for thousands of ten thousand years and that there was no Blood Angels Legion anymore, Meros attacked Rafen in a rage. Before the two could kill on another they were beset by phantom enemies; blood memories of past victories. Fighting side-by-side the two Blood Angels found a sense of camaraderie but it was Rafen who figured out what the magnitude of the two meeting could mean. Before they were pulled from their parallel yet separate blood comas, Rafen managed to utter a single word: [[Horus]], but the Sanguinor appeared and placed its finger over his mouth, indicating that Rafen was to be silent. At that moment, both were pulled back to their respective realities. Upon awakening, Meros was presented before [[Azkaellon]], Captain of the [[Sanguinary Guard]]. who was impressed by his resilience. Azkaellon then informed the assembled Astartes that they had received orders from the [[Warmaster]] to gather the entire IX Legion at the [[Signus System]]. {{Fn|1}}{{Fn|2}} 

During the Blood Angels cleansing of the [[Signus System]], Meros served aboard the ''[[Red Tear]]'', the flagship of the Legion. When the Legion discovered derelict starshps drifting aimlessly through the system, Meros was one of the apothecaries called to examine the bodies of the slain. To his horror, Meros discovered the bodies simply had no bones, nor was there any trace of what had killed the humans. The blood of the bodies had been a strange pinkish hue that reminded Meros of the color of the [[Warp]].