Awww, they're so cute! But, what did they do?? o.O

[Seall]

You come across a mystical witch frog who appears to be travelling via broom. You find them absolutely ADORABLE; I mean, how can you not with those round googly eyes? But, you cannot just ignore their ominous cackling. It also cannot be a coincidence that there is SMOKE behind them. What did they do?