try this arrow witha command block and see its nightmares: /give @p minecraft:tipped_arrow{CustomPotionEffects:[{Id:2,Amplifier:127,Duration:2147483647,Ambient:1b},{Id:4,Amplifier:127,Duration:2147483647,Ambient:1b},{Id:15,Duration:2147483647,Ambient:1b},{Id:18,Amplifier:127,Duration:2147483647,Ambient:1b},{Id:24,Duration:2147483647,Ambient:1b},{Id:27,Amplifier:127,Duration:2147483647,Ambient:1b},{Id:28,Duration:2147483647,Ambient:1b},{Id:31,Amplifier:5,Duration:2147483647,Ambient:1b}],CustomPotionColor:0,display:{Name:"\"Nightmare Arrow\"",Lore:["Better not get hit [Custom arrow by su1c0c1de]"]}}