>>536039597
Stupefy is a good card; it's one of the best you can get against Suitcase, Abigail, Grawp, Erumpent, Fire Crab, and Time Turners... probably a few other things I'm forgetting too.
Unfortunately it doesn't quite cut it against Hagrid specifically because the summons don't *die* so he can just Carpe Retractum -> Flipendo them and they'll heal back to full. It does buy some breathing room in the early game before he gets multiple summons on the field though, and even later on it's still the best tool there is against Suitcase.