@JeremyECrawford Underwater is no sound ?
How does thunder damage work underwater ?

— 西/Ni$hi (@carbine_gentle) February 15, 2018

Sound carries underwater. As a kid, I verified this fact by happily swimming and making noise underwater. 🧜🏻‍♂️ #DnD https://t.co/wzcMVkRqB6

— Jeremy Crawford (@JeremyECrawford) February 15, 2018

Hi @mikemearls & @JeremyECrawford Will great weapon fighting allow me to rerole both damage dice whilst using a great sword?

— Lux 🕹 (@LuxTheLad) February 27, 2018

Yes

— Mike Mearls (@mikemearls) February 28, 2018

Great Weapon Fighting applies to any of the dice of a qualifying weapon. #DnD https://t.co/HpP9jtEkWW

— Jeremy Crawford (@JeremyECrawford) February 27, 2018

Anyone know who it was who came up with the Advantage/Disadvantage mechanic for #dnd? Probably my favourite innovation from 5E. I’d love to know whose brainchild it was. We used an advantage-like mechanic in the 4E avenger, and @mikemearls suggested using something like it more broadly in 5E. I dug the idea and put it before the D&D Next playtesters to try.

— Jeremy Crawford (@JeremyECrawford) February 23, 2018

@JeremyECrawford I have seen two different tweets of yours, so I am looking for clarity.

My lvl 5 druid has a +3 prof bonus, when I shape into a brown bear I have a strof 19 and an attack bonus of 5. Do I add my druid prof bonus to attack bringing it to +7?

Thank you!

— steven civish (@civish_steven) February 4, 2018

The Wild Shape feature does not let you add your proficiency bonus to the proficiency bonus of your beast form. The first bullet of the class feature details which proficiency bonus you use (PH, 67). #DnD https://t.co/D7unCrqRhZ

— Jeremy Crawford (@JeremyECrawford) February 4, 2018

Quick #5e question for Bards. When leveling up can you switch out more than one spell (as per pg53 of the PHB) or is it as written one spell? Potentially stupid question as I’m guessing it’s just the one per level up… One spell.

— Jeremy Crawford (@JeremyECrawford) January 31, 2018

@JeremyECrawford Question! If an undead monster, is concentrating on a spell, and a Cleric uses Turn Undead on that monster…. does that monster make a concentration check? Does it automatically break? Or does it continue concentrating as normal?

— Bryant Smith (@BrontSmoth) February 10, 2018

I thought Turn Undead essentially operates as a fear spell. Wouldn’t the Undead being forced to leave break his concentration? The tweet you're responding to contains the answer to your question.

— Jeremy Crawford (@JeremyECrawford) February 10, 2018

No worries!

— Jeremy Crawford (@JeremyECrawford) February 10, 2018