Minecraft wiki entry for Hardcore_mode, associated text: Once you gather yourself and organize your inventory, jump into the portal and meet your fate. Upon entering the End, the first task is to take out end crystals, because they will heal the dragon. Use arrows (or snowballs) to remove all the towers, while avoiding the Ender Dragon. If you can't avoid her before taking out the crystals, don't hesitate to attack to prevent being blown or knocked off the island.