Looking at the Surprise rules, I wonder, does a character even have a reaction to take before the start of their first turn? I don't have XGtE in front of me.

— Heath Belden (@HeathBelden) November 14, 2017

A number of effects in the game deprive you of the ability to take reactions: being surprised or incapacitated, for example. If you're not suffering such an effect, you can take a reaction before your first turn in a combat. #DnD https://t.co/tfkNchP4xx

— Jeremy Crawford (@JeremyECrawford) November 14, 2017

Yes.

— Jeremy Crawford (@JeremyECrawford) November 10, 2017

@JeremyECrawford Hi Jeremy, In regards to the chance to jump to another target, what happens when someone rolls a Critical Hit on Chaos Bolt?

— Matthew Walsh (@NotTheShyguy) November 27, 2017

The chance for chaos bolt to jump to another target is not lessened by a critical hit. The spell's text says you look at "both d8s"—that's the two dice in the spell itself, not extra dice added from another rule. #DnD https://t.co/oGUxncVZOd

— Jeremy Crawford (@JeremyECrawford) November 27, 2017

Xanathars says identifying a spell being cast is a reaction- this would prevent a player from learning what spell is being cast and then counterspelling it right? You can’t take two reactions at once.

— Jeremy Crawford (@JeremyECrawford) December 4, 2017

@JeremyECrawford The right most picture of Diagram 2.5: Cones Using Tokens in XGtE violates how cone effects are described on PH 204, particularly "A cone's width at a given point along its length is equal to that point's distance from the point of origin."

— Eric Green (@quadhund) November 27, 2017

About the token method for areas of effect in Xanathar's Guide to Everything: "Rather than faithfully representing the shapes of the different areas of effect, this method gives you a way to create square-edged versions of them on a grid easily …" (XGE, 87). https://t.co/ydQdhwxATh

— Jeremy Crawford (@JeremyECrawford) November 27, 2017

@JeremyECrawford The Bard maneuver Mobile Flourish lets you use a reaction to move after attacking. Can reactions be used during your turn?

— pat (@thugducks) November 27, 2017

It is indeed possible to take a reaction on your own turn. Your reaction resets at the start of your turn. #DnD https://t.co/EJbIbCefyw

— Jeremy Crawford (@JeremyECrawford) November 28, 2017

Does the Arcane Archer’s Grasping Arrow deal slashing damage if an affected creature is forcefully moved (e.g. with Thunderwave)? Yes.

— Jeremy Crawford (@JeremyECrawford) December 5, 2017

Couldn’t see via sage advice, are there rules for dashing multiple turns in a row. The chase rules give a scope of 3+Con then scaling exhaustion checks. But what about during combat?There is no dash limit in the combat rules.

— Jeremy Crawford (@JeremyECrawford) November 28, 2017