A block that when placed, let's off a visible yet faint pulse when placed. The vibrations will intensify as you get closer to the pulse. there is a wiring port, both Input and Output. The Input POWERS the signal, and the Output triggers when someone get's caught in the signal. Having trouble finding it??? Then use the Signal Detector Gadget, which will show where the nearest signals are.
#Signal Releaser
mossy turret
north sinew
I feel like you could make another suggestion as like a follow up for the signal detector gadget