Bukkit

Items:
  Common:
    Amount: 2 #Amount of items, Always start with 0.
    '0':
      Item: WOOD_SWORD #Use minecraft material name = All caps.
      Enchantment:
        '0': KNOCKBACK
    '1':
      Item: COBBLESTONE
  Normal:
    Amount: 2
    '0':
      Item: DIAMOND_SWORD
      Enchantment:
        '0': KNOCKBACK
    '1':
      Item: BOW
      Enchantment:
        '0': ARROW_INFINITE
        '1': ARROW_FIRE
  Rare:
    Amount: 2
    '0':
      Item: GOLD_SWORD
      Enchantment:
        '0': KNOCKBACK
        '1': FIRE_ASPECT
    '1':
      Item: DIAMOND_SWORD
      Enchantment:
        '0': KNOCKBACK
        '1': DAMAGE_UNDEAD
  Legendary:
    Amount: 2
    '0':
      Item: DIAMOND_SWORD
      Enchantment:
        '0': FIRE_ASPECT
    '1':
      Item: DIAMOND_SWORD
      Enchantment:
        '0': DAMAGE_ALL