Why is a Death Saving Throw (in the “hands of fate”) successful on a 10 (55% chance of success) or higher rather than 11 (50/50) or higher? Curious. Because we wanted that chance of success.

— Jeremy Crawford (@JeremyECrawford) January 29, 2018

@JeremyECrawford Does Aspect of the Moon allow to skip the DC 10 Con save for not taking a long rest? #DnD

— markovchain (@iamrenejr) December 6, 2017

Aspect of the Moon lets you forgo sleep when you take a long rest. The invocation doesn't remove the need for long rests. #DnD https://t.co/vSZ8HAndvs

— Jeremy Crawford (@JeremyECrawford) December 7, 2017

I know it isn’t RAW, but shouldn’t heavy armor also give disadvantage to perception rolls to the wearer? The design reflects our intent.

— Jeremy Crawford (@JeremyECrawford) December 23, 2017

@JeremyECrawford Is there any restriction on who can cast spells from scrolls? Does it matter if they're divine or arcane? Could a bard cast healing word from a cleric's scroll? Could a wizard cast healing word from a bard's scroll?

— Alex Goode (@densetsu9) January 12, 2018

Curious who can use a spell scroll? Take a look at the section called "Spell Scroll" in the Dungeon Master's Guide (p. 200). Hint: the spell needs to be on your class's spell list. #DnD https://t.co/KFgN9kS3Tb

— Jeremy Crawford (@JeremyECrawford) January 12, 2018

When casting Chaos Bolt and using the Empowered Spell metamagic on the first damage roll, would you be able to reroll only up to the first two d8s, or would you be able to reroll potential secondary damage dice too assuming your charisma modifier was high enough? You can reroll as many dice as your Charisma modifier allows.

— Jeremy Crawford (@JeremyECrawford) December 22, 2017

Why are all druids depicted with animals in the books when they can't have a companion? @JeremyECrawford

— Olav Andre Magnussen (@Olavandrem7) December 20, 2017

Druids and rangers don't require a special class feature to have beast companions. Both classes have access to the animal friendship spell, which enables them to magically befriend beasts, which might join them like any other NPC. #DnD https://t.co/P1KHac7931

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

The issue is that (a) it's magic, not actual friendship, and (b) after you hit 5th level, a lot of beasts will be dead by the end of the first round of combat because their HP is so low.

— GeorgeSutherlandHoward (@Acr0ssTh3P0nd) December 20, 2017

Using the animal friendship spell? Keep this in mind: (1) the spell doesn't have a challenge rating cap, and (2) you can extend your friendship with the beast through roleplaying and the use of skills, as with any NPC. Animal Handling is the most relevant skill here. #DnD https://t.co/CNo4iH8CZT

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

The spell is just a shortcut. No rule says you can’t befriend an animal the old-fashioned way, just like in the real world. Precisely. That's the point of number 2 in my tweet.

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

But a non-magic solution to help a regular animal companion survive high-level situations? I can’t think of any. If you want a no-magic-allowed subsystem for anything in D&D, you'll need to make some house rules, as discussed in the DMG. The whole game assumes magic is available to player characters.

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

Here’s the thing, though:

If there aren’t hard-and-fast rules for your character having a companion, it feels like (and is) a power increase as far as the DM is concerned.

If a ranger has to take a subclass to get a companion, why would anyone else get one for free? No one has to take a subclass to have a companion, and the DM controls whether NPCs decide to stick around.

— Jeremy Crawford (@JeremyECrawford) December 20, 2017

Fair enough, a better choice of words on my part would’ve been that a ranger is GUARANTEED a companion via subclass.

A druid has no such guarantee, requiring instead working with the DM and roleplaying to achieve what seems like a central part of their kit. Druids are guaranteed animal assistance via summoning spells.

— Jeremy Crawford (@JeremyECrawford) December 20, 2017