Requires Snapshot 14w27b or later to run!

I've been playing around with the snapshots recently and I came up with a way to create custom block healths in Vanilla!  The map includes two versions of the mechanism:

• Mechanism 1: Relies on wool data values to track health (more command blocks, smaller device footprint, less functional)
  
  
• Mechanism 2: Relies on location of sandstone block to track health (fewer command blocks, larger device footprint, more functional)
  
  

The two mechanisms will NOT work at the same time, so make sure you only have one enabled, and that you're interacting with the correct type.  If your game starts to lag, you probably interacted with a block health while you had the wrong mechanism enabled.  There's a button to kill all of the wither skulls in the game - that should fix it, then you'll just have to re-spawn the skulls (setup instructions provided in-game).

If you have any questions/comments be sure to let me know and I'll do my best to respond!