The “Construction Patch”:

• When digging out stone (not necessarily walls) with a pick, rocks may fall on your head with a lowish chance, about 10% per dug square. These deal the least damage if you are wearing a dwarven helm, and a little less than normal if you are wearing some other hard helm. Dwarvish characters have a high chance of dodging the falling debris entirely. Possibly also allow a boulder falling on your head from digging similar to when monsters tunnel.
• You can apply rocks at an adjacent floor square to build a wall. It takes 50 rocks, or 25 if there is a boulder in that square. (If the space is marked as being wall-nondiggable, this either doesn’t work, or flips the space to being diggable.) It takes 1 turn per rock to build it. In the process it creates an immovable object or dungeon feature called “partially-built wall” on that space, which tracks how many rocks are part of it. If you move onto the space, you can dismantle the wall and retrieve the rocks.
• You can apply rocks at an adjacent pool or moat to attempt to fill it. The more rocks, the higher the chance of filling it. This takes only 1 turn.
• Stone to fleshing diggable wall turns it into huge chunks of meat.
• Force bolts from striking wands or the spell scatter rocks off diggable walls they hit, and in roughly 5 shots the wall is destroyed.
• Digging a pit or hole puts a pile of rocks on a random adjacent square.
• When you dig a hole and fall down to the next level, you are usually accompanied by a shower of rocks falling on and around you. Dwarves are more adept at dodging and getting hit by fewer rocks.
• When using a pick to dig a square of natural stone where the four orthogonally adjacent squares are all dug out already, you are asked if you want to carve out a boulder. If you say yes, a boulder is deposited on the new space.

Note that the two boulder-creation methods above run the risk of being exploited for abusable quantities of food if you have stone to flesh available, and the stone-to-flesh-walls method explicitly invokes this.

Combine force bolts and digging beams. Specifically:

• Remove the wand of striking and the spell of force bolt.
• Roles that start with force bolt instead start with magic missile and at least 10 maximum Pw.
• All current environment interactions of force bolts (breaking boulders and statues, crashing open doors, etc) are moved to digging beams.
• Make digging beams affect monsters, with a guaranteed hit and fixed 6d12 damage from the spell (since it would be level 5), less damage from a digging wand.

A force bolt beam stops at the first monster or boulder it hits. Breakable items in the path of the beam do not impede it, though.

If you are wielding a shatterable non-artifact and you are hit by a force bolt, whatever you are wielding is shattered.

When a force bolt hits a huge chunk of meat, it turns into a bunch of meatballs (using the same formula for how many rocks are produced from a boulder).