@JeremyECrawford @Dan_Dillon_1
Twinned Spell says: "targets only one creature" Can Dragon's Breath be Twinned since it only "targets" one creature? The cone from Dragon's Breath does not target a creature, it effects an area.

— Michael D Showalter (@ParkSideElec) January 23, 2020

I saw that too. My argument is in the text of Twinned and the word Target. Dragon’s Breath only “targets” once and only one creature No where in the text of Twinned, does it say "affects"

— Michael D Showalter (@ParkSideElec) January 23, 2020

I encourage you to run Twinned Spell in the way that makes the most sense to you and your group.

I've expressed our intent about the dragon's breath spell and Twinned Spell. A group decides whether to embrace that intent.

— Jeremy Crawford (@JeremyECrawford) January 23, 2020

@JeremyECrawford If someone wanted to have Tiamat as a warlock patron which one would she fall under

— Mertrablaze (@mertrablaze) January 28, 2020

If your D&D warlock would like to make a pact with Tiamat, I recommend choosing the Fiend option. Tiamat dwells in the Nine Hells, and she's classified as a fiend in "Tyranny of Dragons." #DnD https://t.co/UGnKPwkEHY

— Jeremy Crawford (@JeremyECrawford) January 28, 2020

Hey @JeremyECrawford ! How is going? Thanks for this channel. Its nice of you to answer our questions!

In the example, how much cover has character number 2 from One's ranged atacks ? Can character 2 use Stealth ?
Thank you. pic.twitter.com/EsKVEr4bhX

— Rafa Gaudard Marques (@RagmTW) January 6, 2020

In the diagram below, character 2 has 3/4 cover against the attacks of character 1. And character 2 could attempt to hide, with the DM's adjudication.

If you're wondering how I determined the degree of cover, see "Cover" in the DUNGEON MASTER'S GUIDE (p. 251). #DnD https://t.co/J764ztN2kQ

— Jeremy Crawford (@JeremyECrawford) January 6, 2020

Cover in D&D is a DM decision, using the parameters in the PLAYER'S HANDBOOK (p. 196).

If you play on a grid, the DUNGEON MASTER'S GUIDE (p. 250–1) provides additional guidance, through text and diagrams. Even then, the DM determines the degree of cover at the game table. #DnD

— Jeremy Crawford (@JeremyECrawford) January 7, 2020

Question about Multiattack, @JeremyECrawford: If a creature has a Multiattack that includes two attacks A and an attack B, and A has longer reach/range than B, can it use that Multiattack when its target is out of reach/range of attack B, or can it only use attack A once? #DnD Are you asking whether a creature can use its Multiattack even if one or more of the attacks can't occur?

— Jeremy Crawford (@JeremyECrawford) January 10, 2020

Yes, that’s correct. Or rather, specifically, I’m asking if it can do that if the Multiattack action is worded “Creature does X” and not “Creature can/may do X.” A monster can use its Multiattack even if one or more of its attacks have no chance of hitting.

— Jeremy Crawford (@JeremyECrawford) January 10, 2020