These deadly gizmos might have passed muster on a standard hunter, but the other evidence cinched the case against him: he had a hammer and a pack of sabotage tree-spikes. Tree-spikes, which ruined saw blades, were common enough for radical Greens; but these spikes contained audio bugs and cellphone repeaters. They could be hammered deep into trees, and they would stay there forever, and they would listen, and they would even take phone calls. They had bizarre little pores in them so that they could drink sap for their batteries.