It may be different for wizards in the world of magic, but they are still children. If they remain inactive for a week or so, they may experience problems such as muscle loss and kidney failure.
finally something is happening, but I don't like how passive the mc is... buddy has no goals, maybe I should just stop reading the "OH NO I DON'T WANT THAT FUTURE TO HAPPEN SO I WILL TRY TO NOT GET INVOLVED IN ANYTHING" stories...