Old School Essentials / Dolmenwood / BX Hacks Thread

I don’t know why this didn’t occur to me before but, for those of us playing and/or running B/X or Old School Essentials (now Dolmenwood too, I guess) games, share the useful hacks that you’ve found or created!

If you’re playing a different sort of game altogether but have a useful hack, don’t be afraid to throw it into the mix!

I’ll start with a trio of mine that I’ve posted recently:

It would be great to get a catalog of sorts going!