Hyperactive Nymune Organ
The Hyperactive Nymune Organs are a Kroot organ that stores great amounts of energy, which increases the speed of the Kroot’s metabolism, improving his raw muscle speed, reflexes, and reaction time.[1]
It is not only purebred Kroots but also other Kroot-based organisms (like a Great Knarlocs, for example) can have this organ.[2][3]
Sources
- 1: Deathwatch: Mark of the Xenos, pg. 15
- 2: Imperial Armour Volume Three - The Taros Campaign, pgs. 217-220
- 3: Saved Archived Rules for Great Gnarloc (dated April 2004, last accessed 26 February 2016)