Have you played enough modded Minecraft that you've gotten used to the idea of a builder's wand? This addition has you covered! If you've never used a builder's wand before, what this addition does is it gives you the ability to craft a special wand that, when held, will let you click on a block face (of up to a 16 block radius of connected same-blocks) and extend it by one block per click. For example, if you have a circle of cobblestone that you want to turn into a tunnel, you can just click on one of the cobblestones to extend it, so long as you have the blocks in your inventory to do so.