@Dastion For the Warlock Old One Pact Telepathy power. Is it one way or two way communication? I read it as one, but others don’t. The intent is for it to be one-way communication, but a DM could certainly rule that it's two-way telepathy, as in monsters.

— Jeremy Crawford (@JeremyECrawford) August 28, 2014

@DastionThanks. As you might have realized, my group of friends does a lot of rules discussion (it stays friendly 🙂 ) I'm glad to hear the rules discussions are friendly! My feeling is that rules should be sidelined if they're souring the mood.

— Jeremy Crawford (@JeremyECrawford) August 28, 2014

@DastionWe’re adventure league DMs for our local store (50 players), so we want a good working knowledge of rules issues/solutions. That's awesome that you have so many players!

— Jeremy Crawford (@JeremyECrawford) August 28, 2014

@Sir_Doog Question! Does the Wizard’s Potent Cantrip feature apply to cantrips with attack rolls or only to saves? Potent Cantrip affects only cantrips that require a save, such as acid splash and poison spray.

— Jeremy Crawford (@JeremyECrawford) August 21, 2014

@PlaguescarredI notice people have different interpretation, does polearm increase reach always or only when attacking with it? The reach property applies only when you attack with a weapon. Any use beyond that is up to the DM.

— Jeremy Crawford (@JeremyECrawford) August 21, 2014

Before you read this answer my advice is to read Dungeon Master’s Guide errata here https://media.wizards.com/2021/dnd/downloads/DMG-Errata.pdf Chapter 8

@KrisKoletar @JeremyECrawfordIf I’m standing right next to 4 Paladins, is anything stopping their auras of protection from stacking?
identical effects don’t stack

— Mike Mearls (@mikemearls) August 7, 2015

@mikemearls @KrisKoletar Identical spells don’t stack (PH, 205), but nothing stops the auras from stacking. Could always house rule it.

— Jeremy Crawford (@JeremyECrawford) August 7, 2015

@JeremyECrawford @mikemearls Would you allow someone to administer a Goodberry with an action to bring someone from dying to 1hp?

— Viktor Lindvall (@Boxvoko) July 27, 2015

I sure would! https://t.co/xIo2lw6k4I

— Jeremy Crawford (@JeremyECrawford) July 27, 2015

@Dan_Dillon_1 @JeremyECrawford

Is an "Archmage" a wizard? It states level 18 spellcaster with wizard spells prepared. In a debate with someone if this falls under the "spellcasting" feature of a wizard, for the sake of Magic Jar. Could they use the archmage's spells?

— Nycepter (@Nycepter) August 7, 2020

The archmage in the D&D Monster Manual isn't a wizard per se, but it does use the wizard spell list. And it's considered a wizard for the purpose of magic item attunement. For more info, see "Spellcasting" on page 10 of the Monster Manual. #DnD https://t.co/ydotjP4rUQ

— Jeremy Crawford (@JeremyECrawford) August 10, 2020

This question relates to the SCAG errata regarding Booming Blade… does the monetary value of the component now negate being able to use your Pact of the Blade weapon or Shadow Blade in conjunction with Booming Blade?

— Baumer Goodtree (@BigBaumer) November 11, 2020

If a D&D warlock creates a weapon with Pact of the Blade, that weapon has the value indicated in chapter 5 of the Player's Handbook (the text of Pact of the Blade directs the reader to that chapter to choose the weapon).

Shadow blade, in contrast, weaves together gloom. #DnD https://t.co/aKwfyUduo3

— Jeremy Crawford (@JeremyECrawford) November 11, 2020

Don’t suppose you’re willing to explain the reasoning, here? The Pact of the Blade feature instructs you to pick a weapon from chapter 5 of the Player's Handbook. There you find the information for the weapon you chose, including its gp value, damage, weight, and properties.

— Jeremy Crawford (@JeremyECrawford) November 12, 2020

Also, what is the value of an Improvised Weapon in this regard? Is it based on the value of the object?

— Dave 🔂 (@Glistam) November 11, 2020

Items in D&D have the value specified for them in the "Equipment" chapter of the Player's Handbook. If an item doesn't appear there or in another rulebook, the DM determines that item's value, if any. #DnD https://t.co/KsrskTh5p6

— Jeremy Crawford (@JeremyECrawford) November 12, 2020

The Shadow Blade itself says “It counts as a simple melee weapon with which you are proficient.” All simple melee weapons are given a value as per Chapter 5 of the Player’s Handbook, and all those values allow it to work with the new version of Booming Blade.I can't stop finding ways to make it work, all RAW and supported by Jeremy's rulings (per the warlock pact weapon and improvised weapons).

— Dave 🔂 (@Glistam) November 12, 2020

As DM, I'd totally let the combo work. Shadow Blade creates a simple melee weapon, and if another rule cares about that weapon's value, I'd pick a value from the list of simple melee weapons in the Player's Handbook and apply that value ad hoc to the shadowy blade.

— Jeremy Crawford (@JeremyECrawford) November 12, 2020

Melee Cantrips used with Bladesinger Extra Attack? IE. cast, first atk with effect, second without?

@FullMthrlJckt @mikemearls
No. Extra Attack requires the Attack action, not the Cast a Spell action.

— Jeremy Crawford (@JeremyECrawford) October 29, 2015