/give @p minecraft:stick{display:{Name:"{\"text\":\"whacker\"}"},Unbreakable:1,HideFlags:1,Enchantments:[{id:"minecraft:knockback",lvl:10}],AttributeModifiers:[{AttributeName:"generic.attackDamage",Name:"generic.attackDamage",Amount:-.9,Operation:2,UUIDMost:70310,UUIDLeast:168701}]} 1