You are right, there is no real reason to look at the visuals apart checking the remaining health of the ennemy to save stronger spells. I just didn't think about it during development. For the spells, they are all different (decribed under the game in the rules) but I tried to make them equals so it doesn't feel really different. Adding monsters weakness could be cool ! Anyway, I don't think I will continue developping this game, but I'll keep it in minde for my next games if they are similar. Thank you for playing and for your constructive opinion !