I've noticed that practically all spells have no duration or cast time. A timer that could be useful for Magic Armor. In short, it would be useful to specify this thing in spells. It cannot be left to chance. There are tons of spells that can make a difference in combat. But it would be right at least to know the duration and once launched that you know when they are going to end.
I think allot of spells are now concentration?
