It's further back in the thread. Mostly combat spells and non-combat rituals. Doing items too would have been too much effort

Also a few versions back, so some of the new stuff isn't free but eh, it was a half-arsed effort to begin with.
Though, more accurately, no spells cost
fatigue to cast, which is part of what makes the combat ridiculous. Dunno if the mod functionality has decoupled fatigue from gem cost since I made the mod, but it wasn't when I did. So I just set most everything's fatigue to 1 and called it a day.
... but yes, no spells cost gems to cast. Mostly. Items still cost gems, to the extent that matters when you're no longer burning gems on rituals and combat magic and can blanket the entire map with akashic knowledge. And summon geometrically growing amounts of sea/troll kings. Well... gold's an issue, with those, but eh.