User blog comment:Tyrannoraptor/why use black arrow to shoot Smaug at the weak spot? why not normal arrows to kill Smaug!/@comment-26082545-20150409155640/@comment-26082545-20150418070007

I agree with that, but shooting some fifty arrows at one place is kinda hard. And as told before, a arrow shatters at his skin, so you need to fire them all at once. Change of succes: smaller the 20%... Or you need a giant catapult to throw them (with more then the half missing)... Or you just be Micheal Bay and decides "I don't like you, now die."