Reply to thread

Message: <blockquote data-quote="Tessarael" data-source="post: 9804476" data-attributes="member: 12909">The only thing that lasts for the round for Booming Blade is the additional thunder damage if the target moves before your next turn. The extra damage on Booming Blade to an attack applies only to the melee attack made as part of casting the spell, "You brandish the weapon used in the spell's casting and make a melee attack with it against one creature within 5 feet of you ... At 5th level, the melee attack deals an extra 1d8 thunder damage to the target on a hit, and the damage the target takes for moving increases to 2d8."It does not provide any additional benefits with Action Surge, as D&D 2024 Action Surge doesn't permit you to take the Magic Action again to cast Booming Blade again. D&D 2014 Action Surge would permit you to cast Booming Blade twice in a round for the additional damage again.Now if you have an opportunity attack after your turn, e.g., from an opponent leaving your reach without Disengage, then you could cast Booming Blade again, if you have the War Caster feat to permit you to do so.</blockquote>