Could be because I'm viewing this on my phone but does Severus have a little smirk/smile on his face in the last frame?! And precisely why is he suddenly waving that wand around? Lol
I also love the bowed heads and shaggy hair lol.
But most of all I like the puppet arms on otherwise flat 2D art! It gives Snape so much expression. Especially when he defensively crosses his little arms hahaha!