The strangest quirk of Kroot digestion is their ability to extract potentially useful strands of their food's DNA. It is known that much of the double helix structure of their DNA is in fact blank, used to separate those areas that do contain genetic information. The Kroot have somehow inherited the ability to incorporate useful DNA codes into their own genetic make-up. Larger Kroot, called Shapers, who have an instinctive understanding of this process, can direct their kindred to consume certain prey in order that, in successive generations, they may take on elements of those genes.

You may field a Kroot Shaper in your Tau army by adding it to a Kroot Carnivore Squad.