Ok this doesn't make you hit harder, but its great from Elemental shamans or class that uses spells.
1.Ok open up your macro menu, (/macro).
2.Type /cast chain lightning
3.Press enter
4.Type /s Nuclear Launch Dected!
5 Add it to your action bar
6.When ever you cast this macro you will cast chain lightning and say Nuclear Launch Dected!
7.This can be used with any spell, or any saying.
8.I hope you enjoy,
P.S. just noticed i spelled title wrong and i can't change.....sorry its my first post.