User blog comment:Oneyedpiratehunter/Luffy gets Ace's Devil Fruit?/@comment-1595565-20140128024255/@comment-5729687-20140128135712

Deus ex machina is an unexpected power or event that solved a hopeless situation usually with no explanation and just come out of nowhere. Red hawk is unexpected the first time, I admit but the few times it was used it never finishes a fight and the attack actually makes sense because of the vulcanization.