Human: Write a detailed character description for a fantasy roleplaying game of a Spiked Cavern Urchin a type of wild animal Assistant: 
Long barbed spines erupt outward from the cavern urchin, almost completely covering its body. The spear-like growths form a formidable defense, and also pose a lethal threat to anything that might find itself close enough to become impaled upon the spiked ends.