Rigwal covers his back in spines, causing him to take reduced damage. Automatically releases a quill spray whenever his rear receives 300 damage on his back.

• 刚背兽的后背有刚毛覆盖,减少他所受到的伤害。刚毛后背每吸收300点伤害会自动释放一次刺针扫射。不能减少来自建筑的伤害。