The Wither Boss is a strong boss mob. It has 3 heads and no legs and arms. It will fire skulls at you. The colors of the skulls are black and blue. You can fire the blue ones back at him.The blue skulls go slower but do more damage while the black skulls go very fast but do less damage. Both of the skulls inflect the wither effect.
How to defeat him?
To defeat him, you will need a smite sword and a potion of strength. Use your bow and shot him down. At half health, it will lower down with a blue shiny shield and the arrows wont hurt him.