Does Spelldriver let u make any 2nd lvl/lower spell a bonus action, or do you need 1 of your 2 spells to be a bonus action? Doesn't change the casting time of any spells. It allows you to cast more than one non-cantrip spell in a round, so long as one is < 3rd lvl

— Matthew Mercer (@matthewmercer) September 11, 2017

Thank you Matt.
To clarify, I couldn’t cast both Fireball and Mirror Image with it, because both are full actions? I’d need 1 bonus actionCorrect. It's generally only useful for spells that take a Bonus Action to cast.

— Matthew Mercer (@matthewmercer) September 11, 2017