This huge creature has a delicate crystalline body completely covered with thousands of spines that almost appear to be made of glass.
As a standard action, once every 5 rounds, a spear urchin can spray poison from numerous smaller spines across its body. This poison fills a 20-foot-radius spread around the urchin—all creatures within this area are exposed to the urchin’s venom and must make Fortitude saves as detailed above to resist Wisdom damage and confusion. This attack is even more effective underwater, as the poison spray creates a cloud that lingers in the area around the urchin for 5 rounds—creatures must save each round they begin a turn in the area of the poison cloud in addition to when the urchin creates the effect.
A glass urchin’s spines can swivel and rotate to face any approaching creature that attacks it. Any creature that attacks a glass urchin with an unarmed strike or a natural attack, or any Huge or smaller creature that attacks with a one-handed weapon or light weapon, is automatically attacked by the glass urchin’s spines as an immediate action. If the spines hit, they can poison the target as well.
A glass urchin’s spines and body are transparent when underwater, granting the creature concealment and a constant 20% miss chance.