Thanks for all the advice! I can use it. I dug trenches so deep I was taking fall damage in the process of getting in and out of them while working on it. Then I hit ground water and the trenches filled up to where I was swimming and couldn't dig any deeper. The grey thingies and assorted taller gangly creatures attacked. Now I have about a dozen of them trapped in the trench. I can't get a shot off with my bow and they can't hit me with the rocks they toss. Maybe I need to learn how to build a tower so I can shoot down into the trenches better.