Another system that does it well imo is Shadowrun. In 5th edition (never played the others) when you cast a spell you can take mental damage. If you cast the spell on a weak level you are fine but if you go full-out then you can KO yourself pretty quick. Especially if you roll bad on your damage resist roll.
Another system that does it well imo is Shadowrun. In 5th edition (never played the others) when you cast a spell you can take mental damage. If you cast the spell on a weak level you are fine but if you go full-out then you can KO yourself pretty quick. Especially if you roll bad on your damage resist roll.