This command summons a zombie with almost everything, he is almost a Boss Mob!
Put it in a command block, also, be ready to fight it

Java Edition 1.18
/summon zombie ~ ~1 ~ {PersistenceRequired:1,CanPickUpLoot:1b,CanBreakDoors:1b,HandItems:[{Count:1,id:iron_sword,tag:{Enchantments:[{id:smite,lvl:2},{id:knockback,lvl:1},{id:fire_aspect,lvl:1},{id:looting,lvl:3},{id:sweeping,lvl:1},{id:unbreaking,lvl:2},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}},{Count:1,id:iron_axe,tag:{Enchantments:[{id:smite,lvl:4},{id:efficiency,lvl:3},{id:silk_touch,lvl:1},{id:unbreaking,lvl:3},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}}],ArmorItems:[{Count:1,id:iron_boots,tag:{Enchantments:[{id:soul_speed,lvl:1},{id:feather_falling,lvl:4},{id:blast_protection,lvl:1},{id:thorns,lvl:2},{id:depth_strider,lvl:3},{id:binding_curse,lvl:1},{id:unbreaking,lvl:3},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}},{Count:1,id:iron_leggings,tag:{Enchantments:[{id:protection,lvl:2},{id:thorns,lvl:2},{id:binding_curse,lvl:1},{id:unbreaking,lvl:3},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}},{Count:1,id:iron_chestplate,tag:{Enchantments:[{id:protection,lvl:2},{id:thorns,lvl:2},{id:binding_curse,lvl:1},{id:unbreaking,lvl:3},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}},{Count:1,id:iron_helmet,tag:{Enchantments:[{id:blast_protection,lvl:4},{id:respiration,lvl:1},{id:aqua_affinity,lvl:1},{id:thorns,lvl:2},{id:binding_curse,lvl:1},{id:unbreaking,lvl:3},{id:mending,lvl:1},{id:vanishing_curse,lvl:1}]}}],CustomName:"\"Iron\"",HandDropChances:[1.0f,1.0f],ArmorDropChances:[1.0f,1.0f,1.0f,1.0f],ActiveEffects:[{Id:1,Amplifier:0,Duration:999999},{Id:3,Amplifier:0,Duration:999999},{Id:5,Amplifier:0,Duration:999999},{Id:6,Amplifier:0,Duration:999999},{Id:8,Amplifier:1,Duration:999999},{Id:10,Amplifier:0,Duration:999999},{Id:11,Amplifier:0,Duration:999999},{Id:12,Amplifier:0,Duration:999999},{Id:13,Amplifier:0,Duration:999999},{Id:14,Amplifier:0,Duration:999999},{Id:21,Amplifier:0,Duration:999999},{Id:22,Amplifier:0,Duration:999999},{Id:26,Amplifier:0,Duration:999999},{Id:28,Amplifier:0,Duration:999999},{Id:29,Amplifier:0,Duration:999999},{Id:30,Amplifier:0,Duration:999999}]}

If you play another edition, comment below