You have been gifted with the larva of a Worm God. This nearly one meter long parasite has fused with your body in a symbiotic relationship—granting you biological immortality along with the power to restructure your body however you wish. As long as your worm lives, you are able to generate new mutations as effortlessly as breathing and can easily adapt to any environment.
By committing acts of murder and destruction, you may extract greater powers from your worm. In exchange for feeding your worm with death, you may call upon the Darkness with signs and rituals: harnessing the powers of soulfire and decay to destroy your enemies. While your understanding of Hive Arcana is limited for now, it—like your body—will only grow with time.
Unlike the Hive, you will not be devoured for failing to feed your worm, nor will you be required to tithe death to anyone apart from yourself. Optionally, you may take the form of any of the standard Hive Morphs—gaining the powers and physique of a Thrall, Acolyte, Wizard, Knight, or Ogre.