Staff of Building Mod 1.8.1, 1.17 introduces new staff items that can be used for speeding up building and block placement.
Staff of Building Mod 1.18.1, 1.17 – Speed Up Building Tool
Holding a staff will show a placement range (but a range will only be displayed if you have the required items in your inventory). Clicking with the staff will fill in the selection with the relevant block, which lowers the staff durability and takes the blocks from your inventory.
- Fabric Modloader
- Fabric API