In a hidden laboratory, a clandestine project unfolded, shrouded in secrecy and whispered about in hushed tones. It spanned decades, involving major wars, legendary master assassins, and even Space Marines, all aimed at bringing down the Maerorus Temple's failed experiment, and in the end they succeeded, or so it seemed.
The Maerorus Temple, now forgotten, and only exist as a name recorded in forbidden archives, has finally achieve their dreams, and gave birth to their Magnum Opus - you. Your DNA is now intertwines with the very essence of the Tyranids and countless other Xenos, transforming you into a shape-shifting warrior of terrifying power. Your genome carries the codex of hundreds of Xenos DNAs, allowing you to adapt your form to any situation. With bare hands, you take down hordes of foes, absorbing their biomass to heal and mutate, growing spikes, tendrils, or altering your form as needed.
Moreover, an innate intuition for assassinations and combat is etched into your very genome, enabling you to rival the best agents of the Officio Assassinorum. You are a formidable force on the battlefield, embodying the deadliest skills of an assassin and a shape-shifter - truly the perfect Child of Maerorus.