Prickled Shell

"“Sores begin to expand on your back, eventually rupturing the skin entirely. Beneath a hardened shell with cruelly sharpened thorns emerges. On rolling, you find yourself able to crash into enemies with your shell and deal substantial damage to them.” —In-game description"

Effects

 * Rolling into an enemy deals damage
 * Reflect Shots from Rear
 * + 40 Health
 * - 80 Speed