Dragon's Breath save dc: Caster or Breather?

[Cikomyr]

I was wondering if the save dc of the dragon breath spell is based on the Caster 's stat and expertise or the breather?

[Sigreid]

If it doesn't say otherwise, I'd have it be the caster's stat, since they're the ones actually providing the magic.

[Cikomyr]

Okay, thanks.

Question 2: would the Caster's bonuses to elemental damage (ex, from a Feat) would apply to the spell? Ex: a Tiefling with Flames of Plegetho cast Fire Dragon Breath, does his teammates who got the buff get to reroll the 1s?

[Ventruenox]

If the tiefling made the actual roll, yes. Otherwise, RAW, no.

[Cikomyr]

If the tiefling made the actual roll, yes. Otherwise, RAW, no.

Who makes the roll then? The cast or the breather? 😅

[Ventruenox]

The breather is using their action, but Flames specifies, "When you roll fire damage for a spell you cast", not "when damage is rolled". So if the tiefling is the one rolling the dice, should be legal.

That said, I would totally allow the re rolls at my table.