Kakophoni

The Cacophony or Kakophoni in the ancient form, were a specialised anomalous support unit of the Emperor's Children Legion, created during the closing days of the Great Crusade Chief Apothecary Fabius who sought to "perfect" the gene-seed of the Astartes by unlocking the secrets of the Emperor's original genetic engineering and then "improving" upon it through the use of forbidden Chaotic knowledge.