So be careful of blowback I remember a player wayyyyy back in the day casting lightning bolt in a 10 by 10 room and killed the entire party when it bounced like 6 times.So I have found out lightning bolts don't bounce in 5th edition. Well we will need to change that. This old school module is set up with an encounter (or two), where the wizard wants to bounce his bolt.
New houserule - Lightning Bolts and other like attacks bounce off solid surfaces. So watch out.
As such I need the extra damage - [roll0] for the lightning breath.