Added Old-School Essentials (OSE) version

I've published an alternate version of the booklet, designed for use with Old-School Essentials (and any other B/X D&D retro-clones). The narrative and most of the content remains unchanged - the biggest difference is in the monsters section, where I modified the stat blocks to fit OSE formatting and rules differences versus Knave 2e. One of the other "big" changes was modifying "coins" to "gold", "c" to "gp", and references to "d4" etc. to "1d4" etc.

It's the system I run at my table, and I hope this booklet finds use at yours!

I also made some minor edits/fixes to the v2 booklet for Knave.