@Sayers00th @ChrisPerkinsDnD if a char w/ 2 light weapons cast booming blade would they be able to bonus action to make an offhand attack I don't believe so, as that requires using the attack action rather than casting a spell
— (((Mike Mearls))) (@mikemearls) June 10, 2016
Can you grapple (“special attack action”) and then use a bonus action for an offhand attack?