Defeat the Wither storm from Minecraft story mode WASD to move, space to attack. Click the boxes at the bottom to switch weapons. Mouse to aim bow. The bow will not work on the wither when he's at half health or lower. If you shoot to many arrows at a time it will get laggy, so only shoot three or four at a time. if the wither storm is overleveled run and avoid getting eated and dont get hit by heads
the wither storm will heal up at 50 sec thanks to @mushroomman1009 to the regular wither