Wither Skeletons are more dangerous versions of Skeletons found in The Nether. They have a Stone Sword (something that can not be owned (or used) by (the) Player(s) or other Mobs), which can deal the Wither Effect.
-Wither Skeletons will deal the Wither Effect to any player(s) that it hits
-Wither Skeletons have a chance of dropping a Wither Skull, which are used to summon the Wither Boss
- Just like Skeletons, Wither Skeletons are particularly clever, and will do the same things a normal one would do to get to the player, and can equip themselves/pick up items, plus they can armor themselves and put pumpkins and Jack-O-Lanterns on their head.
- While Wither Skeletons can always intoxicate you, normal Skeletons can only do sow with a Enchanted Bow and Enchanted Arrows.
- Wither Skeletons can ride a Cave Spider as opposed to normal Skeletons, who ride normal Spiders.