Puff

/summon ender_dragon ~ ~20 ~ {CustomName:"Puff the Magic Dragon",CustomNameVisible:1,DragonPhase:1,ArmorItems:[{},{id:skull,Damage:5,Count:1b,tag:{display:{Name:"Puff's Head"}}},{id:spawn_egg,Damage:125,Count:1b,tag:{EntityTag:{id:"minecraft:Llama",IsBaby:1}}},{id:spawn_egg,Damage:121,Count:1b,tag:{display:{Name:"Puff"},EntityTag:{id:"minecraft:PolarBear",IsBaby:1}}}],HandItems:[{id:diamond_horse_armor,Count:1b,tag:{display:{Name:"Puff",Lore:["Puff the Magic Dragon lived by the sea","and frolicked in the autumn mist","in a land called Honnah Lee"]}}},{id: sea_lantern,Count:32b}],ArmorDropChances:[0.0F,0.4F,0.2F,0.2F],HandDropChances:[0.2F,0.2F],PersistenceRequired:1}