u/Cato69

I've never been super big into Harry Potter, I mean I've read all the books and seen most of the movies, but I was never a huge fan, but recently I've had this strange niggling urge to run some sort or "Magic academy" game for my players. I want something with either a decent magic system that's somewhat flexible, or something rules light that has just enough mechanics to feel satisfying. I'm also a little burned out on normal medieval fantasy, but matters of setting are entirely for me to tweak. Thanks in advance for your help.

I'm dipping my toes into simpler RPG systems lately, starting with hacks/de-makes like World of Dungeons and Risus, and it has me wondering: what are the simplest systems you've played that have adequately sustained long campaigns? i.e. where the simplicity of the system doesn't pose a problem after a couple of sessions?