Demon

/summon minecraft:wither_skeleton ~ ~1 ~ {CustomName:Demon,CustomNameVisible:1,Glowing:1,FallFlying:1,ArmorItems:[{},{},{id:"minecraft:elytra",Count:1},{id:"minecraft:lit_pumpkin",Count:1}],Health:99,Attributes:[{Name:"generic.maxHealth",Base:99}],HandItems:[{id:"minecraft:iron_sword",Count:1},{id:"minecraft:iron_sword",Count:1}],ArmorDropChances:[0F,0F,0.1F,0F],ActiveEffects:[{Id:14,Amplifier:0,Duration:2147483647}]}