How to summon and beat the Wither in Minecraft
You summon the Wither yourself with 4 Soul Sand and 3 Wither Skeleton Skulls, and it drops the Nether Star you need for a beacon.

The Wither Skeleton Skull drops rarely from wither skeletons killed by a player, or from a charged creeper's blast; three of them on a T of Soul Sand summon the Wither. Mob heads are decorative blocks you can place on the ground or a wall, or wear on your own head. All mob heads work the same; the Creeper Head page explains them.
This item has no crafting recipe.
You summon the Wither yourself with 4 Soul Sand and 3 Wither Skeleton Skulls, and it drops the Nether Star you need for a beacon.
Paper + Wither Skeleton Skull
| powered | true · false |
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| rotation | 0 · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 |
Mining the block drops it. It is dropped by Wither Skeleton.
It is a decorative mob head to place, wear or put on a note block. It is an ingredient in one recipe: Skull Charge Banner Pattern.
2 enchantments: Curse of Binding and Curse of Vanishing.
No: when a piston pushes it, it breaks and drops as an item.
Spooky Scary Skeleton (Obtain a Wither Skeleton's skull).