From Hobby Dungeon Games
PDF – Pay What You Want

I said I wouldn't make expansions for Skirmish Game – I lied.
Mad Gods is a one-page ruleset that I'm using to infuse my games with a bit of dark-soulsian flare. I typed it up so that you can also give it a try.
This addition provides a teeny tiny bit of fluff, three religious factions, a new enemy type, and two new actions your heroes and leaders can take during the game.