Hello there!
The answer to your question is Draconian.
The word Jagged is an adjective, so therefore it can't be this one. And honestly, you never hear someone call someone jagged.
Insanely (means mentally ill) mean isn't right either. And, you never hear someone being called that.
Crazy hard, well, you don't hear it either.
So, that leaves you with draconian.
Hope this helps!
