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Gives a pretty cool sword when defeated. /give @p wither_skeleton_spawn_egg{EntityTag:{id:"minecraft:wither",CustomName:"\"Ultra Wither\"",CustomNameVisible:1,Health:500,Attributes:[{Name:"generic.maxHealth",Base:500},{Name:"generic.followRange",Base:500},{Name:"generic.movementSpeed",Base:1f}],Fire:0,HandDropChances:[2F,2F],HandItems:[{id:"minecraft:netherite_sword",tag:{display:{Name:'{"text":"Withering Arkhalis"}'},Enchantments:[{id:sharpness,lvl:5},{id:smite,lvl:5},{id:bane_of_arthropods,lvl:5},{id:fire_aspect,lvl:2},{id:looting,lvl:3},{id:sweeping,lvl:3}]},Count:1},{}]}}

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