@JeremyECrawford Does nondetection also hide you from a monster's truesight?

— dan armstrong (@maniac227) October 13, 2016

The nondetection spell hides you from divination magic. Truesight is a sense, not a form of divination magic. #DnD https://t.co/FWnKh4417t

— Jeremy Crawford (@JeremyECrawford) October 13, 2016

@JeremyECrawford Does a failed spellcasting because of Counterspell still count as a trigger for Mage Slayer's attack?

— Dimas Pradipta (@dimas_pr) September 27, 2016

Counterspell causes a spell to fail. It doesn't undo the fact that spellcasting occurred. #DnD https://t.co/61gIfhmDkI

— Jeremy Crawford (@JeremyECrawford) September 27, 2016

@JeremyECrawford Is a Fire Genasi able to use his/her Produce Flame while in rage, since it's a race feature, or does it count as a spell?

— Joseph Bridgewater (@JOSEPH91304707) October 12, 2016

A spell is a spell, no matter its source. #DnD https://t.co/YHuDSwdiHK

— Jeremy Crawford (@JeremyECrawford) October 12, 2016

For Book of Shadows warlock: what constitutes “finding” a ritual spell? A book/scroll? Observation of cast?

@frizbog @mikemearlsFor Book of Shadows warlock: what constitutes “finding” a ritual spell? A book/scroll? Observation of cast? Finding one written down.

— Jeremy Crawford (@JeremyECrawford) October 25, 2014

@SorcererQzot @JeremyECrawford @frizbogCan they write down a spell they have prepared already? no – requires creation of a scroll or spellbook

— Mike Mearls (@mikemearls) April 25, 2016

@JeremyECrawford Do Awakened Trees or Treants count as trees for a Dryad's Tree Stride ability? Or are Plant type creatures separate?

— James (@JMMatuku) September 27, 2016

Tree Stride is meant to work with trees that aren't plant creatures. That said, a DM could rule otherwise and break nothing. #DnD https://t.co/fciLt3YQ0t

— Jeremy Crawford (@JeremyECrawford) September 27, 2016

@mikemearls @JeremyECrawford Can a creature (or druid) ready the multiattack action?

— David (@thethain) October 12, 2016

A creature is meant to use Multiattack only on its turn, not on someone else's. #DnD https://t.co/EiqkTEZVDg

— Jeremy Crawford (@JeremyECrawford) October 12, 2016

@JeremyECrawford "you can extinguish the fire […] & you create either fireworks or smoke". Is extinguishing optional?

— Bardface (@brightwoodbard) October 20, 2016

Pyrotechnics: extinguishing the fire is optional (the key word here is "can"). #DnD https://t.co/R7c7DGMWai

— Jeremy Crawford (@JeremyECrawford) October 26, 2016