Addon Wither Storm is a free add-on for Minecraft that adds the Wither Storm Boss, a challenging enemy that requires players to strategize and work together to defeat it. The add-on can be played on Android devices and is developed by Rudio Studio Craft. The program falls under the Education & Reference category and specifically the subcategory of Books.

To spawn the Wither Storm Boss, players will need four soul sands and three wither skulls, which can be obtained through gameplay. Once spawned, the boss is incredibly powerful and can easily destroy players' houses. Players can damage the boss using arrows, but once it loses around half of its health, it becomes immune to arrows. The most effective way to defeat the boss is by using Formidi TNT, which has a longer fuse than regular TNT but creates a larger explosion.

Overall, the Addon Wither Storm is a fun and challenging addition to Minecraft that requires players to work together to defeat a powerful enemy. However, players should be cautious when attempting to defeat the boss alone and should monitor their health and distance carefully. The add-on is not affiliated with Mojang AB and adheres to their terms and conditions.