@JeremyECrawford @mikemearls
A wizard takes the Fey Teleportation feat. Any hoops to jump through, or can it add Misty Step to its spellbook?
Same question for a Cleric with Ritual Caster feat. Can it easily add Purify Food and Drink to its ritual book?

— Craig Brown (@CraigBCBrown) December 13, 2018

To copy a spell into your spellbook or ritual book, you need a written version of the spell. You need to see the magical writing and transcribe it.

That said, a DM might allow you to write a spell in your book that you learned some other way. #DnD https://t.co/9tyEHcJ3dJ

— Jeremy Crawford (@JeremyECrawford) December 13, 2018

This needs to be fixed. It’s a horrible system for a Tome Lock. You’re using so many resources to get it in the 1st place. I thought it was such a cool/spicy build. I was wrong it was a trap. With the gold already needed to transcribe it even-kinda ridiculous imo My tweet didn’t pertain to Pact of the Tome.

— Jeremy Crawford (@JeremyECrawford) December 14, 2018

Lock Ritual casting follows the same rules right? The Book of Ancient Secrets does follow the rules in its text, requiring the warlock to transcribe a spell.

— Jeremy Crawford (@JeremyECrawford) December 14, 2018

I use the table in the PH or make up weird magical events on the fly.

— Jeremy Crawford (@JeremyECrawford) December 13, 2018

Epic Alexander
you can also use the Wild Magic table in Tome of Magic in D&D 2e. 100 wild surge results for your unexpected fun https://t.co/EgdQcykhka pic.twitter.com/nhgxtytqcJ

— Zoltar SageAdvice (@SageAdviceDnD) December 19, 2018

@JeremyECrawford
Confusing about scribing spell scrolls: can I create spell scroll with a spell that has a different level to its lowest possible spell level?
1) With DMG rules, can I craft a 5th fireball spell scroll?
2) With XGE rules, can I create a 5th fireball spell scroll?

— Draconis (@DerynDraconis) December 6, 2018

Will tales of the yawning portal be errata-ed to reflect this change in rulings or are the spell scrolls found in the sunless citadel somehow exceptions?

— Toh Choon Hao (@toh_choon) December 11, 2018

Adventure designers and DMs aren't bound by the rules that determine how player characters do things. For example, an adventure designer can create a spell scroll with an 8th-level fireball on it, even though there's no straightforward way for a player character to do that. #DnD https://t.co/lQQJ29tR5W

— Jeremy Crawford (@JeremyECrawford) December 11, 2018

Jeremy, as the official “rules guy”, can you PLEASE put this debate to rest?

Is tool proficiency required to use Thieves Tools, or can anyone make the tool check (e.g. open Lock) without bonus?

And can a bard with Jack of All Trades pick a lock with tool using half prof bonus?Jeremy, as the official "rules guy", can you PLEASE put this debate to rest?

Is tool proficiency required to use Thieves Tools, or can anyone make the tool check (e.g. open Lock) without bonus?

And can a bard with Jack of All Trades pick a lock with tool using half prof bonus?

— Nick Landry ☝️😎 (@ActiveNick) December 13, 2018

Proficiency isn't required to use a tool, unless that tool's description says otherwise.

Other things in the game might make exceptions and require proficiency, but those exceptions have no effect on how tools work otherwise. #DnD https://t.co/gWRoG1ghdx

— Jeremy Crawford (@JeremyECrawford) December 14, 2018

As usual, clear as mud. What further clarification would you like?

— Jeremy Crawford (@JeremyECrawford) December 14, 2018

Maybe a "yes" or "no" followed by a repeat of the question, such as "Yes, you need profiency with thieves' tools to open a lock, although that is a rule of locks, not of tools in general".

— Millstone85 (@Stonemill1985) December 15, 2018

You don’t need proficiency with thieves’ tools to use them. If you did, the description of the tools would say so.

Some locks require you to have proficiency with thieves’ tools to unlock them. That is a property of those locks, not of locks or tools in general. #DnD https://t.co/zzXMCgF8qT

— Jeremy Crawford (@JeremyECrawford) December 15, 2018

pic.twitter.com/D8kZabKyTB

— Jeremy Crawford (@JeremyECrawford) December 15, 2018

Question for @JeremyECrawford and any #DungeonMaster that uses the Flanking rule in #DnD:

An incapacitated creature does not grant Flanking – but does a prone creature offer it? pic.twitter.com/ArbmLL8N6W

— Rob 🎲 🍷 🏳️‍🌈 (@DiceRefgemlin) November 12, 2018

If being prone had any effect on your ability to flank, the flanking rule would say so. #DnD https://t.co/XONIi2qEhr

— Jeremy Crawford (@JeremyECrawford) November 12, 2018

This brings up an interesting debate I had a few months back. Is Vampirism a disease or curse?

— Brent Earnest (@ForTheXPDM) December 11, 2018

In D&D, being a vampire is neither a curse nor a disease in the rules. It's simply your new, dark existence. I hope you like the taste of blood! #DnD https://t.co/edaa240oog

— Jeremy Crawford (@JeremyECrawford) December 11, 2018

Then how does one remove Vampirism?

— Brent Earnest (@ForTheXPDM) December 11, 2018

If you're a vampire, your vampirism isn't a condition you're suffering. You're a vampire. There's no easy way to get rid of it. That's why it's such a horror. And that's why a stake through the heart is a common remedy. #DnD https://t.co/nzEPlCHyPE

— Jeremy Crawford (@JeremyECrawford) December 11, 2018