I think you want to replace that first comma with a period.You can also pass through occupied squares, In a slipping charge, you can only fly level or descend, but you don't provoke attacks of opportunity as you fly.
Run a google site-search for "Breath of Fire" and then another one for "Cold Iron Dragon".
Sonic Rainboom needs to specify the saving throw DC for the Prismatic Wall. Also, I would like to know the source that inspired this.