Terraforming inworld is good fun but sometimes you just want to restore an area to its pristine state and this simple tool allows you to do that. Simply add the script to a flat prim, move the prim to the position and height required, touch the prim to turn it on (shown in hovertext) and the land at that point is rapidly raised (or lowered) and flattened. The script is both very simple and editable. It is sold at 10 KC, the lowest price allowed on the market.

https://www.kitely.com/market/product/3835590/Land-Flatterner