Wither skeletons are tall black variants of skeletons equipped with stone swords that inflict the poison-like Wither effect. They are found exclusively in nether fortresses and are the only source of wither skeleton skulls, as well as the only renewable source of coal. Wither skeletons wander aimlessly when idle, but sprint to attack players, snow golems, iron golems, baby turtles, piglins, and piglin brutes. They flee from wolves but retaliate if attacked. (Shout out to @Geodexe for motivation!!!)