ok, i saw now. This information seems a bit too hidden to me.
Not to mention that it is also wrong (former magic armor), but I could also say mage hand which should last a minute, but actually we don't know exactly when this will disappear. The duration of the spells is incorrect and I think it should be revised or calibrated. Magic armor for example cannot last until a long rest. in short, I believe that for the casters there are still things to see. If they put a timer or something like that it would be more accurate.
