User blog comment:Oneyedpiratehunter/Luffy gets Ace's Devil Fruit?/@comment-1595565-20140128024255/@comment-5729687-20140129000342

The fact that Luffy never uses red hawk to finish a fight, it just merely served as a devastating attack so by definition, it is not a Deus ex machina. Believe me, Deus ex machina is not really a good plot device.