wait what how does this even work
When you use your wrench a static shape is made that's the size of your ghost brick that has raycasting and no collision.
When the static shape is hit it counts it as wrenching your ghost brick, which apparently Blockland has pretty much no problem with.
When you plant a brick, the properties from your ghost brick are applied to the brick you plant.
It's basically if you want to plant a bunch of the same brick. Instead of placing a brick, doing what you want to it, and then using the duplicator to duplicate a single brick a bunch of times, you can just modify your ghost brick directly.