Fantastic. I absolutely love your comic. It is the beginning of something new, but I rather like stories that end like that instead of bringing everything to a closure.

McGonagall's glasses ane frown are perfect. I think what makes her appear rather unfair towards Snape is the fact that she addresses him as "Snape" only, while she addresses the others as "Mr...". I like to believe that she has become a better teacher in the past 20 years. ;)