The Wither Skeleton Skull is a rare item in the game Minecraft. It is dropped by Wither Skeletons, which are tall, dark variants of skeletons found in Nether fortresses. Players can collect these skulls to use in crafting and summoning. When a player collects three Wither Skeleton Skulls, they can combine them with soul sand to summon the Wither, a powerful boss mob. The skulls are not only valuable for this purpose but also serve as decorative items in player-built structures. Their rarity makes them a sought-after item for players looking to enhance their gameplay experience.