From Creatures Wikia
Here is K-man's description of the Xigan Norns:
- The Xigan Norns have controled aging. When attacked and wounded, life chemical is used to heal the wound. In this way, the physical age of a Xigan norn can be controled.
- There are differant colors in EVERY life stage (differant being other than the defult CL colors). They change to a gender-spesific color at breeding age (youth).