J'ai crée une méga commande pour faire apparaitre un boss vanilla pls faite le (dans un command block)
/summon Skeleton ~0 ~1 ~0 {HandItems:[{Count:1,id:diamond_axe,tag:{Unbreakable:1,display:{Name:Hache de combat},ench:[{id:35,lvl:3},{id:16,lvl:5}]}},{}],ArmorItems:[{id:diamond_boots,tag:{Unbreakable:1,ench:[{id:7,lvl:1}]}},{id:diamond_leggings,tag:{Unbreakable:1,ench:[{id:7,lvl:1}]}},{id:diamond_chestplate,tag:{Unbreakable:1,ench:[{id:7,lvl:1},{id:34,lvl:3}]}},{Count:1,id:skull,Damage:3,tag:{SkullOwner:NicolasGysels,display:{Name:Tete du boss}}}],CustomName:Boss-Nicolas,CustomNameVisible:1,Attributes:[{Name:generic.maxHealth,Base:900},{Name:generic.movementSpeed,Base:0.5},{Name:generic.attackDamage,Base:10},{Name:generic.followRange,Base:10},{Name:generic.knockbackResistance,Base:0.7}],HandDropChances:[2.0F,0.0F],ArmorDropChances:[0.0F,0.0F,0.0F,2.0F],ActiveEffects:[{Id:17,Amplifier:1,Duration:999999},{Id:9,Amplifier:1,Duration:999999},{Id:2,Amplifier:1,Duration:999999}],SkeletonType:1}
/summon Skeleton ~0 ~1 ~0 {HandItems:[{Count:1,id:diamond_axe,tag:{Unbreakable:1,display:{Name:Hache de combat},ench:[{id:35,lvl:3},{id:16,lvl:5}]}},{}],ArmorItems:[{id:diamond_boots,tag:{Unbreakable:1,ench:[{id:7,lvl:1}]}},{id:diamond_leggings,tag:{Unbreakable:1,ench:[{id:7,lvl:1}]}},{id:diamond_chestplate,tag:{Unbreakable:1,ench:[{id:7,lvl:1},{id:34,lvl:3}]}},{Count:1,id:skull,Damage:3,tag:{SkullOwner:NicolasGysels,display:{Name:Tete du boss}}}],CustomName:Boss-Nicolas,CustomNameVisible:1,Attributes:[{Name:generic.maxHealth,Base:900},{Name:generic.movementSpeed,Base:0.5},{Name:generic.attackDamage,Base:10},{Name:generic.followRange,Base:10},{Name:generic.knockbackResistance,Base:0.7}],HandDropChances:[2.0F,0.0F],ArmorDropChances:[0.0F,0.0F,0.0F,2.0F],ActiveEffects:[{Id:17,Amplifier:1,Duration:999999},{Id:9,Amplifier:1,Duration:999999},{Id:2,Amplifier:1,Duration:999999}],SkeletonType:1}