Branches of Lunis concealis, the unusual tree only seen in the light of the full moon. The sap of L. concealis has superb medicinal qualities when applied to superficial wounds, however, due to its invisibility most of the time, it is also responsible for 98% of the injuries it helps to heal. This had lead to groups such as the OPS (Over Protective Society) and the CWB (Cotton Wool Brigade) calling for its eradication, which has in turn enraged environmentalists. But as neither can successfully find the trees to chop down / strap themselves to, so far the feud has only resulted in shouting matches and the odd egg throw in public.