• When you first load into a world, a mysterious water pillar is coming down from the skies... (x: 0 z: 0)

• If you swim up that water pillar, you will eventually find floating islands, one of these islands contain the most powerful block in the game... THE COMMAND BLOCK

• On that island, you will find the Command Block levitating on an Ancient Command Block Levitator (more on that later).

If you place it, how do you break it?

• You need to forge a "Command Block Destroyer™" in a Smithing Table:

• (Press F6 to disable warnings)

• The command block can emit a redstone level of 15 if you place it on an Ancient Command Block Levitator.

• Ancient Command Block Levitator Crafting Recipe:

why is this useful?

• You can take away the command block and then the signal goes away.
• There is only one Command Block in the game, so if you have it, you're the only one who can activate an Ancient Command Block Levitator.

• Survival Friendly Command Block is an add-on to Cracker's Wither Storm Mod, although it is not required.

  

+Feature

• Removes all the Rundown Houses and replaces them with the Floating Ruins.