No NBT required he says... :D

§f☼§7KP2§r:
    spell-class: ".PassiveSpell"
    always-granted: true
    name: §f☼§7KP2§r
    triggers:
        - kill player
    chance: 100
    cancel-default-action: false
    spells:
        - §2☠001§r
    cast-without-target: false
    str-cast-self: "§4Booty swaggin bag''n taggin!§r"
§2☠001§r:
    spell-class: ".ExternalCommandSpell"
    name: §2☠001§r
    enabled: true
    cooldown: 2
    helper-spell: false
    temporary-op: true
    always-granted: true
    command-to-execute:
        - 'summon fireworks_rocket ~ ~-1 ~ {LifeTime:1,FireworksItem:{id:fireworks,Count:1,tag:{Fireworks:{Explosions:[{Type:1,Flicker:1,Trail:1,Colors:[I;15806719,3691519,16762759,12776447,12910413,6225882,3407749,7023615],FadeColors:[I;12910413,6225882,3407749,7023615]}]}}}}'
        - 'effect %t minecraft:levitation 20 90'
        - 'summon Item ~ ~ ~ {id:"minecraft:skull",Damage:3,Count:1b,tag:{SkullOwner:{Name:"%t"}},NoGravity:1b,Motion:[0.0,0.1,0.2],Rotation:[10f,180f],Invulnerable:1,Fire:160,CustomName:"§0§k§lx§r §f§l%t''s Flying Face! §0§k§lx§r",CustomNameVisible:1,Glowing:1,Item:{id:"minecraft:skull",Count:1b,Damage:3,tag:{SkullOwner:{Name:"%t",Id:"%t"}}},Age:4300,PickupDelay:40}'
    require-player-target: true
    execute-as-target-instead: false
    block-chat-output: true
    obey-los: false
    range: 5
    effects:
        1:
          position: target
          effect: explosion
        2:
          delay: 2
          position: target
          effect: blockbreak
          id: 249
          height-offset: 1.0
        3:
          delay: 4
          position: target
          effect: blockbreak
          id: 215
          height-offset: 2.0
        4:
          delay: 6
          position: target
          effect: blockbreak
          id: 87
          height-offset: 3.0
        5:
          delay: 8
          position: target
          effect: blockbreak
          id: 152
          height-offset: 4.0
        6:
          delay: 10
          position: target
          effect: blockbreak
          id: 153
          height-offset: 3.0
        7:
          delay: 12
          position: target
          effect: blockbreak
          id: 249
          height-offset: 2.0
        8:
          delay: 14
          position: target
          effect: blockbreak
          id: 214
          height-offset: 1.0
        9:
          position: target
          effect: Nova
          type: 209
          data: 0
          radius: 1
          expand-interval: 1
        10:
          delay: 16
          position: target
          effect: Nova
          type: 115
          data: 0
          radius: 2
          expand-interval: 2
          height-offset: 2