Ageing is a chemical in the original Creatures. It decays from the moment of birth and at certain points its reducing level triggers a change in life stage. The original intention was for death to occur when the chemical reached a very low point, but this was left out of the original genome and is only present in certain breeds - see life stage for further details. Ageing was replaced by the chemical Life in later games. IV Antioxidant can be injected in all standard norn breeds to increase the concentration of Ageing.
- Norn ~10 hours or indefinite