Green-Flame Blade:

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.

This states that so long as the attack is a melee attack made with a weapon, you may use this cantrip and apply its affects. I realize improvised weapon has weapon in the name, and is under the weapons category, but it would also mean that I can use a mug as an improvised weapon with Booming Blade. I see no reason why this would not work, but I'm still curious to see how others may interpret this.


"Melee attack with a weapon" is different from a "melee weapon attack" - so long as what you use is a weapon (including improvised weapons, but not unarmed strikes) and you make an attack with it, you have fulfilled the precondition. You can even use a ranged weapon (as an improvised weapon) to make a melee attack.

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    \$\begingroup\$ You may want to update your answer now that unarmed strikes are melee weapon attacks \$\endgroup\$ – NautArch Jun 16 '18 at 13:42
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    \$\begingroup\$ @DaleM Does what you say go against this Crawford clarification? sageadvice.eu/2015/09/06/… \$\endgroup\$ – Medix2 Jun 16 '18 at 13:59
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    \$\begingroup\$ @NautArch -- they still do not count as melee weapons twitter.com/JeremyECrawford/status/… \$\endgroup\$ – ravery Jun 16 '18 at 14:08
  • \$\begingroup\$ @ravery they may not count as weapons, but they do count as a melee attack with a weapon per the tweet medix linked. \$\endgroup\$ – NautArch Jun 16 '18 at 15:39
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    \$\begingroup\$ @NautArch -- by the tweet, "unarmored attack" counts as a "melee weapon attack" for the sake of action cost, not as a "melee attack" with a weapon, because body parts are not weapons. \$\endgroup\$ – ravery Jun 16 '18 at 17:07

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