You've discovered a fortress defended by the fearsome, 3-headed wither and 2 wither skeletons, deep within the Nether. The forbidding structure holds vital supplies, such as nether wart and mushrooms. Use your Minecraft™ know-how to build a TNT cannon. Then don your iron armor and helmet, grab your bow and launch a surprise attack! Fire the powerful cannon and bring the fortress walls crashing down! Then muster all your strength, reload and fight to survive!