The beast has become a flightless arboreal trilobite! It will hide its head underneath its carapace and use its lures to attract prey, mimicking mating or injured insects. It has an (unintentional) resemblance to the Opabinia.
I keep the weirdest reference open when designing one of these. This one was (from what I recall) rhinoceros-crab-eel-trilobite-angler fish? This dude’s one of my favorites so far!