'world' : #The name of the world.
  drops:
    GRASS_BLOCK : # ID of the broken block
      DIRT : # ID of the dropped block
        - 20 %  # Drop percentage
        - 3   # Drop amount
      DIAMOND :
       - 50 %
        - 1
      SPRUCE_LOG :
       - 20 %
        - 5
      messages : # You can set a custom message on silk break.
        - '&2You cannot use Silk Touch on a block of grass.  You get a simple dirt block.'

    DIAMOND_ORE:
      DIAMOND :
       - 50 %
        - 2
      DIAMOND_ORE :
       - 50 %
        - 1
      # You won't get a message if you don't put it.

no-permission : '&4You have not the permission to break this block.'
no-permission-action : ' none'     # You can set either 'prevent breaking' or 'none'