@JeremyECrawford Is is possible to Twin Spell Booming Blade, hitting two adjacent targets withing reach?

— Tim Wilder (@mrprotoman) April 13, 2017

Twinned Spell test: can the spell affect only one creature at the spell's current level, and is its range not self? If yes, TS works. #DnD https://t.co/nv6PqmzF0z

— Jeremy Crawford (@JeremyECrawford) April 14, 2017

@thuggibearWhat about chaos bolt? That has a new attack roll only targeting one target at a time, but can potentially effect more. Neither the feature nor the test I tweeted talks about attack rolls. Can the spell affect more than one creature? That's the question.

— Jeremy Crawford (@JeremyECrawford) April 14, 2017

So I understand correctly, because the initial target of the spell can never change, it can be twinned? So since the Dragon's Breath spell only ever targets the one creature who I cast it on, it can be twinned and both recipients can use the effects?

— TheSandwichNinja (@TheSandwichPira) December 22, 2017

Dragon's breath can affect more than one creature with the exhalation. It therefore can't be twinned. #DnD https://t.co/97DzcSR7pZ

— Jeremy Crawford (@JeremyECrawford) December 22, 2017

I completely agree with @doransiegetower. The target of Dragon’s Breath is “one willing creature.”

— Observant Oliphaunt (@zoozeki) December 22, 2017

That’s like saying haste has 2 sets of targets, the hastened person and everyone that they use their extra actions to attack, or that everyone that tries to hit a mage armored person is also a target. Neither of the spells you mentioned create an area of effect with its own targets. Dragon’s breath is exceptional.

— Jeremy Crawford (@JeremyECrawford) December 22, 2017

How dragon's breath works has no relevance to other spells. See below.https://t.co/LKiIipxbw1

— Jeremy Crawford (@JeremyECrawford) December 22, 2017

That’s silly. I’m not going to try and account for *possible* targets. It targets the creature it gives the breath to, and that’s it. I know you’re the “word of law,” but that’s silly. Luckily, there’s nothing for you to account for. You cast the spell on someone. They exhale on someone else. The end.

— Jeremy Crawford (@JeremyECrawford) December 12, 2018

what’s the in-house opinion about spells and character options from Sword Coast Adventure’s Guide that weren’t put in Xanathar’s? Were they considered too specific, niche, or thematic with the setting or was it because of power issues or something else?We chose things from the SCAG to put in "Xanathar's Guide" that we wanted to make available for play in the entire D&D multiverse. Other things in SCAG we're happy to leave in the Forgotten Realms, for which they were designed.

— Jeremy Crawford (@JeremyECrawford) 7 maggio 2018