Can you counter spell it?

— Nathan Moore (@RealNathanMoore) January 26, 2018

Counterspell counters spells. #DnD https://t.co/1BVasuYZhB

— Jeremy Crawford (@JeremyECrawford) January 26, 2018

@JeremyECrawford In melee, if one combatant goes invisible on their action, then simply moves away, does this trigger an AOO?

— Darrell Rodgers (@DarrellARodgers) March 9, 2018

Similar to the quoted tweet, if you cannot see the creature because it is invisible, then you cannot make an opportunity attack against it. But you can attack an invisible creature
Why not opportunity attack?

— Darrell Rodgers (@DarrellARodgers) March 9, 2018

An opportunity attack is triggered by seeing a creature leave your reach. It's the trigger that relies on sight. On their own, attacks don't rely on sight. #DnD https://t.co/zv3zAfEh31

— Jeremy Crawford (@JeremyECrawford) March 9, 2018

@JeremyECrawford if two wizards stand next to each other and both cast Antimagic field at the same time, what happens? Does it change if they stand 15 feet apart?

— Ian Kimmel (@IanKimmel1) January 25, 2018

Want to know what happens when two antimagic fields overlap? Take a look at the last sentence of the spell. Hint: the spheres have no effect on each other. #DnD https://t.co/OOgIJ2oFMT

— Jeremy Crawford (@JeremyECrawford) January 25, 2018

The Warlock Eldritch Invocations are permanent upgrades? Or it’s like a spell slot?They're permanent upgrades.

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

Have a D&D rules question? There's a good chance I've answered it!

1. Search the Sage Advice Compendium: https://t.co/nlIvbEC7D7.
2. Search Twitter, typing my handle (@JeremyECrawford) and a relevant term, like "Twinned Spell."
3. Search https://t.co/5oYKuatgLB. #DnD pic.twitter.com/JXtO9catjP

— Jeremy Crawford (@JeremyECrawford) November 18, 2017

@JeremyECrawford Say my fighter died twice in 2 game days. Does -4 the penalty accrued from Raise Dead stack for each casting? I know spells usually don't stack, but Raise Dead sounds peculiar #DnD

— Hiten Dave (@HitD7) March 14, 2018

A spell doesn't stack with itself. #DnD https://t.co/Syfqhbz0fq

— Jeremy Crawford (@JeremyECrawford) March 14, 2018

@JeremyECrawford given the fact that throwing Alchemist's Fire is "Use an Object" action, on hit it adds DEX modifier to damage?

— Draconis (@DerynDraconis) January 25, 2018

Alchemist's fire is treated as an improvised weapon. When you hurl it at someone, you make a ranged attack against them. The damage roll of a ranged weapon attack includes your Dexterity modifier. #DnD https://t.co/SHHBAGcr1h

— Jeremy Crawford (@JeremyECrawford) January 25, 2018

Would you (personally) classify the impact as bludgeoning, piercing, or fire damage? I could see the logic for any of those.

I'm leaning towards bludgeoning, myself.

And now I'm shocked that none of my players have ever actually thrown any of the alchemist's fire they have.

— David Swanson (@DavidDaSwan) January 25, 2018

Alchemist's fire deals fire damage. 🔥 #DnD https://t.co/U8ma8vFAMV

— Jeremy Crawford (@JeremyECrawford) January 25, 2018

Isn’t “On a hit, the target takes 1d4 fire damage at the start of each of its turns” an exception to that rule though? It’s not dealing damage on impact the way a normal ranged attack would. The exception is about timing; you take the damage later, rather than on impact. That exception doesn't alter the general rule about damage rolls.

— Jeremy Crawford (@JeremyECrawford) January 25, 2018

Well wouldnt it be strength mod? since it's an improvised weapon you're throwing and it doesnt have the finesse property? kinda like a dagger vs a handaxe https://t.co/rh1CQkcCtD

— Austin Gray (@Austin_Khaz) January 25, 2018

The description of alchemist's fire says you make a ranged attack. Ranged weapon attacks use Dexterity, unless another rule tells you otherwise. Even improvised weapons follow the normal rules for melee and ranged attacks. #DnD https://t.co/fsrK6XyFuw

— Jeremy Crawford (@JeremyECrawford) January 25, 2018

So 0+dex fire damage then 1d4 fire damage at the start of each of their turns?

— Flashy's Dragon Maid (@DrewFlashy1) January 25, 2018

Alchemist fire delays its damage roll; it doesn't happen at the moment of impact. The damage roll is at the start of each of the target's turns. #DnD https://t.co/UhZzCtfNoh

— Jeremy Crawford (@JeremyECrawford) January 26, 2018

Someone brought up the interaction of Deflect Missiles an Alchemist Fire as well, which is even more complicated! I'm glad people are discussing the possibilities! It's always fun when people discover things that have been in the books since 2014. Like finding gold right in your backyard!

— Jeremy Crawford (@JeremyECrawford) January 26, 2018