@jakejnelsonWhat happens if you level up and put a point in an ability score while wearing an item which sets that score to 19? The answer depends on the specific item you're wearing.

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@jakejnelson If you increase your Intelligence to 19 or higher while wearing a headband of intellect, the item ceases to affect you.

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@JeremyECrawford But if I have the headband on, and I put a point in Intelligence, does it go to 20 or stay at 19?

— Jake Nelson (@jakejnelson) August 30, 2015

@JeremyECrawford Assuming it's normally lower than 19.

— Jake Nelson (@jakejnelson) August 30, 2015

@jakejnelson The headband has no effect on the score on your character sheet. The item effectively overwrites a score lower than 19.

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@jakejnelsonSo the score would become 20?
The ability increase ignores the headband. It is increasing the score on your character sheet.

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@JeremyECrawford If a spell has a longer casting time, do you have to complete its time requirement in order to successfully cast the spell

— Samual Engler (@BiiigSam) August 28, 2015

See the "Longer Casting Times" section of the Player's Handbook (p. 202) for how such casting times work. https://t.co/3aVpF5oz1c

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@ChrisPerkinsDnD Thursday will be my first time as DM. Your seamless story-weaving and all around grooviness is an inspiration to me.

— Teresa Markos (@teresamarkos) September 2, 2015

Let me know how it goes! https://t.co/WKHZ5SpA2f

— Christopher Perkins (@ChrisPerkinsDnD) September 2, 2015

@ChrisPerkinsDnD I was nervous, talked too fast, ran out of my adventure early and had to make up the rest on the spot. It was great!

— Teresa Markos (@teresamarkos) September 4, 2015

@JeremyECrawford Do you guys have some math that showing a 1st level Cleric's Goodberry healing as much as a level 7 cure wounds is not bad?

— Loremaster Ryrok (@ryrok) August 28, 2015

It's about actions. Goodberry needs 9+ actions and a level in cleric to do what 7th-level cure wounds can do with 1. https://t.co/7KorDyzLN8

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@JeremyECrawford Does your type change when you change form as a druid? ie. do you become an elemental that could be banished to earth plane

— Shaun Davis (@DarkFool87) August 28, 2015

Yes, your type changes, but your native plane doesn't change. https://t.co/tW7jAH6N7n

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@JeremyECrawford How do you consider a creature, given telepathic abilities, would only be able to send? You can’t… split it like that.

— neceros (@neceros) August 29, 2015

Some abilities allow sending thoughts, some allow reading thoughts, and some allow both. https://t.co/xSlREofQeT

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@necerosUnfortunately, it comes off as if you’re just balancing game details in exchange for fiction and logic. I wasn't talking about game balance. An analogy: The radio lets me listen to someone else's voice. The telephone lets me talk back.

— Jeremy Crawford (@JeremyECrawford) August 30, 2015

@ChrisPerkinsDnD I plan to pick up the full set of 5e books, but are there such things as Centaurs, but with the torso of a Deer?

— Nicholas Woodman (@Red_Finch) September 3, 2015

Yes. Earlier editions had a deer-bodied centaur-like creature called a hybsil. https://t.co/4LAR9PiqRm

— Christopher Perkins (@ChrisPerkinsDnD) September 3, 2015

@JeremyECrawford When a halfling passes through the space of a creature larger than it, will/should the halfling take damage?

— Barantor (@Barantor) August 29, 2015

The halfling is hurt only if the larger creature has a fiery aura or another effect that deals damage in its space. https://t.co/oc9mvF9O0t

— Jeremy Crawford (@JeremyECrawford) August 30, 2015