Does Booming Blade Work with Unarmed Strikes?
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The short answer is a definitive no. The booming blade cantrip, a popular choice for melee characters in Dungeons & Dragons 5th Edition (D&D 5e), explicitly requires a melee weapon as part of its casting. An unarmed strike, while considered a melee weapon attack, is not considered an attack with a melee weapon. This distinction is crucial and often causes confusion among players, but it’s a core element of the spell’s functionality.
Why Unarmed Strikes Don’t Qualify
The specific wording of booming blade states that you must make “a melee attack with a weapon” as part of casting the spell. This is not the same as a “melee weapon attack.” Here’s why this difference matters:
- Unarmed strikes are not weapons: While you are making a melee weapon attack with your fist, your fist is not considered a weapon in D&D 5e’s rules. Weapons in 5e are explicitly defined and listed within the rulesets and include things like swords, axes, and maces, or natural weapons such as claws. Unarmed strikes, even if they do damage, do not qualify for that distinction.
- Melee Weapon Attack vs. Attack with a Melee Weapon: This is the heart of the issue. A melee weapon attack refers to the type of attack you are making using Strength or Dexterity; a melee weapon refers to the object you are using for the attack.
- Rules as Intended: The design intention of the game is that spells like booming blade require you to be wielding an actual weapon. This makes spell usage more diverse, as you need a weapon to benefit from many of these spells.
Implications of the Ruling
This distinction has several interesting ramifications:
- Paladin Smites: Paladins can use Divine Smite on an unarmed strike because it is still a melee weapon attack. However, this is also a melee attack with no weapon, making it incompatible with booming blade.
- Monk Abilities: Monks rely heavily on unarmed strikes, so they are not able to leverage the benefits of booming blade directly with these actions. They must use an actual weapon to use the spell.
- Balance and Design: This design keeps the cantrip from becoming too easily abused by classes that don’t rely on weaponry.
Frequently Asked Questions (FAQs) About Booming Blade and Related Topics
Here are some related questions regarding booming blade that will help you understand its interactions and limitations:
1. Are Fists Finesse Weapons?
No. Unarmed attacks are not considered finesse weapons. They do not inherently use Dexterity over Strength for attacks. You can use Strength for your unarmed strike, but you do not have the option to use Dexterity.
2. Can Booming Blade Be Used with Natural Weapons?
No. Just as with unarmed strikes, natural weapons like claws or bites also do not qualify for booming blade. The spell explicitly requires a melee weapon which are typically things listed on the equipment list, or in a feature that grants a specific listed weapon.
3. Can Booming Blade Be Used with Extra Attack?
No. Extra Attack triggers when you take the Attack action. Booming blade requires you to take the Cast a Spell action. These actions are not interchangeable and cannot be combined.
4. Should You Use Booming Blade or Extra Attack?
It depends on the situation and the character build. Extra Attack is better for consistent damage, while booming blade can offer higher damage when the secondary effect triggers, especially when combined with forced movement. Extra Attack also has better scaling with features that proc on a hit.
5. Does Booming Blade Work with Forced Movement?
Yes, but with caveats. If the target is forced to move on its turn, it will trigger the extra damage from booming blade. However, forced movement from spells like Dissonant Whispers, which require reactions to move, do not count as a creature “willingly moving” for purposes of triggering the booming damage.
6. Does Booming Blade Count as a Melee Attack?
Yes. It is specifically a melee weapon attack. It uses the same ability modifier as a standard melee weapon attack (typically Strength or Dexterity). However, it doesn’t use your spell attack modifier.
7. Does Booming Blade Work on Shadow Blade?
Generally, no. While the shadow blade is a weapon you make a melee weapon attack with, the general consensus is that booming blade doesn’t work with it because of specific material component limitations, it requires a real weapon worth at least 1sp. Many DMs rule that it is not a valid material component.
8. Can You Use Shillelagh and Booming Blade?
Yes. Shillelagh, which turns a club or quarterstaff into a magic weapon usable with Wisdom, works well with characters who want to use booming blade and focus on Wisdom. It allows classes like Druids or Clerics to use booming blade effectively without requiring Str or Dex.
9. Can You Do Two-Weapon Fighting with Booming Blade?
No. Two-weapon fighting requires you to take the Attack action, whereas booming blade requires the Cast a Spell action. These actions are mutually exclusive.
10. Can You Sneak Attack on a Booming Blade?
Yes. Sneak Attack works with any melee attack that hits a creature if you otherwise meet the criteria. As booming blade is a melee attack, it qualifies for Sneak Attack.
11. Does Booming Blade Work with Soul Knife?
No, the Soul Knife’s Psychic Blade ability is not compatible with the spell due to the requirement to make an attack with a weapon. Because the Psychic Blade is explicitly not a weapon, it is not compatible with the spell.
12. Does Booming Blade Deal Damage on Hit?
Yes, but indirectly. The booming blade does the regular weapon damage. The extra damage is a spell effect that triggers if the target moves, so you only deal extra damage to the target if they move.
13. Can You Stack Green Flame Blade and Booming Blade?
No. You cannot cast two cantrips in one turn, unless you have abilities that explicitly allows you to do so, such as the Eldritch Knight’s action surge. Even with that, you can only cast one of each, not two of the same.
14. Can You Smite on a Booming Blade?
Yes. Paladins can use Divine Smite with booming blade because it’s a melee weapon attack, meeting the necessary criteria. Because the spell also has a weapon attack component, it can be smited.
15. Can You Cast Booming Blade as an Attack of Opportunity?
Yes, provided you have the Warcaster feat. Warcaster allows you to cast spells as an attack of opportunity, and because booming blade is a spell with a casting time of one action, it can be used this way.
Conclusion
While the interplay of D&D 5e’s rules can sometimes be complex, the distinction between a melee weapon attack and an attack with a melee weapon is crucial in understanding how booming blade functions. Unarmed strikes are melee weapon attacks but not attacks with a melee weapon. Consequently, they don’t qualify for use with the booming blade cantrip. Understanding these nuances can allow you to maximize your character’s effectiveness while remaining within the established rules of D&D 5e.