Added damage types and effect riders

[Quoz]

Does damage added from sources not native to a spell trigger feat or ability riders on that spell?

Example in question: A celestial warlock with a Flame Tounge casts the booming blade spell. Would the flame damage from the magic weapon trigger the level 6 Pact ability Radiant Soul? Would it make the spell compatable with the Elemental Affinity (flame) feat?

[Icecaster]

No because the spell doesn't deal fire or radiant damage. The spell deals thunder damage. The attack deals fire damage. Neither of those features apply to attacks.

[Woggle]

Does damage added from sources not native to a spell trigger feat or ability riders on that spell?

In general, no. There may be an exception that I'm not aware of of, but I can't think of any.


Example in question: A celestial warlock with a Flame Tounge casts the booming blade spell. Would the flame damage from the magic weapon trigger the level 6 Pact ability Radiant Soul? Would it make the spell compatable with the Elemental Affinity (flame) feat?

No, as the melee attack that delivers Booming Blade is not itself the spell. Here's the relevant part from the cantrip description:


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.

As I read it, it specifies the melee attack is not itself part of the spell, but is necessary for delivering the spell. The spell's damage is only the thunder damage.

Edit: ninja'd

[BloodSnake'sCha]

Radiant Soul
Starting at 6th level, your link to the Celestial allows you to serve as a conduit for radiant energy. You have resistance to radiant damage, and when you cast a spell that deals radiant or fire damage, you can add your Charisma modifier to one radiant or fire damage roll of that spell against one of its targets.

The ability say it only effect the damage that the spell deals.


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. If the target willingly moves before then, it immediately takes 1d8 thunder damage, and the spell ends.
From the BB spell description the attack is a condition of the spell and not is effect.


You can use a bonus action to speak this magic sword's command word, causing flames to erupt from the blade. These flames shed bright light in a 40-foot radius and dim light for an additional 40 feet. While the sword is ablaze, it deals an extra 2d6 fire damage to any target it hits. The flames last until you use a bonus action to speak the command word again or until you drop or sheathe the sword.

The sword is dealing the fire damage, not the spell.


When you gain this feat, choose one of the following damage types: acid, cold, fire, lightning, or thunder.

Spells you cast ignore resistance to damage of the chosen type. In addition, when you roll damage for a spell you cast that deals damage of that type, you can treat any 1 on a damage die as a 2.
You can select this feat multiple times. Each time you do so, you must choose a different damage type.

The feat is refreshing spells again.


You can just use Green Flame Blade.

Edit:SwordSage'd