[RPG] Does the Hexblade warlock’s Hex Warrior feature change Booming Blade to use your Charisma modifier

ability-scorescantripsclass-featurednd-5ewarlock

Since the Hexblade warlock's Hex Warrior feature changes your pact weapon's attack modifier to use Charisma instead, does it also turn booming blade's modifier from Strength to Charisma?

Best Answer

Hex Warrior and booming blade can work together.

When you attack with that weapon, you can use your Charisma modifier, instead of Strength or Dexterity, for the attack and damage rolls. This benefit lasts until you finish a long rest.

"That weapon" being either the daily touched weapon or the Pact of the Blade weapon. I'll call it the HW-weapon for short.

When you cast booming blade, you have to make a melee attack with a weapon. Usually, that involves using either the Strength or Dexterity modifier, because that's how the typical rules for attacks work - not because booming blade asks you to use either modifier.

If you make that melee attack with your HW-weapon, then you follow the Hex Warrior rules as you would for any attack with your HW-weapon and add your Charisma modifier instead of Strength or Dexterity.

The key point here is that Hex Warrior does not modify the booming blade cantrip; rather, it modifies the melee weapon attack made as part of the booming blade cantrip.