The question is – can I cast Booming Blade or Green Flame Blade twice with my attack action? No. You can replace one of your attacks from the Attack action with a cantrip. Booming Blade or Green Flame Blade usually require using the Cast a Spell action in order to use.
Does booming blade count as an attack action?
Booming Blade is an action and part of the spell attack action. So you get weapon + Booming Blade damage.
Can you combine booming blade and divine smite?
No. Assuming you are asking that if you have had haste cast on you, can you cast Green Flame Blade, Booming Blade and smite in a single round.
Can a booming blade be used on a Green Flame Blade?
There are various sage advice tweets from Jeremy Crawford confirming this with regards Booming Blade and Green-Flame Blade. I guess there are several options, as the OP wrote. RAW it seems that the point where the opportunity attack occurs, the target is still within 5′ reach (see wording I bolded above).
What happens when you use the booming blade spell?
As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and it becomes sheathed in booming energy until the start of your next turn.
Do you get bonus damage with booming blade?
It takes an action to cast the spell. This means that you cannot also take the Attack action and benefit from the Extra Attack feature that some classes possess. So no, it is a tradeoff. Booming Blade’s regular bonus damage applies only if the target moves willingly. Otherwise, it does normal attack damage.
What’s the rule for the booming blade attack?
Everyone else takes damage. Personally I would rule that the creature has moved and therefore the booming blade damage occurs. If the creature chooses not to move to avoid the booming blade damage then it isn’t moving away to provoke the opportunity attack.
