vampire knife with only one command

/summon FallingSand ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:FallingSand,Block:redstone_block,Time:1,Passengers:[{id:FallingSand,Block:activator_rail,Time:1,Passengers:[{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false},{id:MinecartCommandBlock,Command:"fill ~2 ~-3 ~-1 ~8 ~-1 ~2 stained_hardened_clay 0 hollow"},{id:MinecartCommandBlock,Command:"fill ~2 ~-2 ~-1 ~8 ~-2 ~2 stained_glass 5 replace stained_hardened_clay"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add USEITEM stat.useItem.minecraft.carrot_on_a_stick"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add HOLDITEM dummy"},{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{\\\"text\\\":\\\"klick \\\",\\\"color\\\":\\\"black\\\",\\\"bold\\\":true}",Text2:"{\\\"text\\\":\\\"to\\\",\\\"color\\\":\\\"black\\\",\\\"bold\\\":true}",Text3:"{\\\"text\\\":\\\"destroy\\\",\\\"color\\\":\\\"black\\\",\\\"bold\\\":true}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-1 ~-1 ~7 ~1 ~2 air\\\"}}"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/scoreboard players set @a[score_USEITEM_min=1] USEITEM 0"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/scoreboard players set @a[score_HOLDITEM_min=1] HOLDITEM 0"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/execute @a[score_USEITEM_min=1,score_HOLDITEM_min=1] ~ ~ ~ /execute @e[c=3,rm=1,r=8] ~ ~ ~ /effect @a[c=1,score_USEITEM_min=1,score_HOLDITEM_min=1] instant_health 1 1 true"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~ chain_command_block 3 replace {auto:1,Command:"/execute @a[score_USEITEM_min=1,score_HOLDITEM_min=1] ~ ~ ~ /effect @e[c=3,rm=1,r=8] wither 5 3 true"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/scoreboard players set @a HOLDITEM 1 {SelectedItem:{id:minecraft:carrot_on_a_stick,tag:{display:{Name:\\\"Vampire_knife\\\",Lore:[*9*]}}}}"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/scoreboard players tag @e[tag=Craft8] remove Craft8"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/entitydata @e[tag=Craft8] {Items:[0:{Slot:13b,id:\\\"minecraft:carrot_on_a_stick\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*9*\\\"],Name:\\\"Vampire_knife\\\"},AttributeModifiers:[0:{UUIDMost:62974,UUIDLeast:53810,Amount:25,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:73521,UUIDLeast:613854,Amount:3,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.armor\\\",Operation:0,Name:\\\"generic.armor\\\"}]},Damage:15s}]}"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ repeating_command_block 5 replace {auto:1,Command:"/scoreboard players tag @e[tag=CraftAnvil] add Craft8 {Items:[0:{Slot:3b,id:\\\"minecraft:diamond_hoe\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*[]*\\\"],Name:\\\"golden dagger\\\"},AttributeModifiers:[0:{UUIDMost:582390,UUIDLeast:491256,Amount:8,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:185970,UUIDLeast:9102,Amount:1.9d,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackSpeed\\\",Operation:0,Name:\\\"generic.attackSpeed\\\"}]},Damage:100s},1:{Slot:4b,id:\\\"minecraft:diamond_hoe\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*+*\\\"],Name:\\\"blood dagger\\\"},AttributeModifiers:[0:{UUIDMost:582390,UUIDLeast:491256,Amount:20,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:185970,UUIDLeast:9102,Amount:1.0d,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackSpeed\\\",Operation:0,Name:\\\"generic.attackSpeed\\\"}]},Damage:77s},2:{Slot:5b,id:\\\"minecraft:diamond_hoe\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*/\\\\*\\\"],Name:\\\"emerald dagger\\\"},AttributeModifiers:[0:{UUIDMost:582390,UUIDLeast:491256,Amount:15,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:185970,UUIDLeast:9102,Amount:1.0d,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackSpeed\\\",Operation:0,Name:\\\"generic.attackSpeed\\\"}]},Damage:84s},3:{Slot:12b,id:\\\"minecraft:iron_ingot\\\",Count:32b,Damage:0s},4:{Slot:13b,id:\\\"minecraft:diamond_hoe\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*()*\\\"],Name:\\\"purpur sword\\\"},AttributeModifiers:[0:{UUIDMost:582390,UUIDLeast:491256,Amount:23,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:185970,UUIDLeast:9102,Amount:0.5d,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackSpeed\\\",Operation:0,Name:\\\"generic.attackSpeed\\\"}]},Damage:200s},5:{Slot:14b,id:\\\"minecraft:iron_ingot\\\",Count:32b,Damage:0s},6:{Slot:21b,id:\\\"minecraft:iron_ingot\\\",Count:32b,Damage:0s},7:{Slot:22b,id:\\\"minecraft:diamond_hoe\\\",Count:1b,tag:{Unbreakable:1,display:{Lore:[0:\\\"*{}*\\\"],Name:\\\"redstone dagger\\\"},AttributeModifiers:[0:{UUIDMost:582390,UUIDLeast:491256,Amount:9,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackDamage\\\",Operation:0,Name:\\\"generic.attackDamage\\\"},1:{UUIDMost:185970,UUIDLeast:9102,Amount:1.5d,Slot:\\\"mainhand\\\",AttributeName:\\\"generic.attackSpeed\\\",Operation:0,Name:\\\"generic.attackSpeed\\\"}]},Damage:6s},8:{Slot:23b,id:\\\"minecraft:iron_ingot\\\",Count:32b,Damage:0s}]}"}},{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block},{id:MinecartCommandBlock,Command:kill @e[type=MinecartCommandBlock,r=1]}]}]}]}