@BulletpointeQuestion: Does a ‘permanent’ True Polymorph still end if the target hits 0 hp? nope, needs some sort of magical intercession to end it.

— Mike Mearls (@mikemearls) October 9, 2014

@eerongaldueling fighting style: yay or neigh to unarmed strikes and the monks martial arts? the book response is no. Doesn't break anything if you allow it, though.

— Mike Mearls (@mikemearls) October 9, 2014

@luminapinaMage slayer/ready action hits while casting a spell. Should there be a concentration check for all spells, excl. maybe cantrips? readied action takes place after trigger, so first spell then attack. No check needed.

— Mike Mearls (@mikemearls) October 8, 2014

@luminapinaOkay, thank you. So Counterspell is the only way to interrupt the casting of spells with one action or shorter casting times? Correct, at least with what's available in the PHB.

— Mike Mearls (@mikemearls) October 8, 2014

@Brail4 @JeremyECrawford @ChrisPerkinsDnDAm I right..Wiz should know roll before using Shield,cant ‘waste it’ from not knowing roll? correct

— Mike Mearls (@mikemearls) October 8, 2014

@eerongaldoes a shapeshifted monk/druid benefit from increased damage die from monk? nope – not unless the attack is specifically an unarmed strike, as opposed to a claw or bite

— Mike Mearls (@mikemearls) October 8, 2014

@rwallace8665 Help me settle a disagreement: can a human warlock summon a Dao’s maul or a Storm Giant’s greatsword as their pact weapon? i'd say no, or at the very least the warlock couldn't effectively wield it.

— Mike Mearls (@mikemearls) October 8, 2014

@rwallace8665Can you settle an argument for me? Can a human warlock use a Dao’s maul or Storm Giant’s Greatsword as a pact weapon? I would say that they could use a maul or a greatsword, but there's no "storm giant greatsword" to choose from in the game.

— Rodney Thompson (@wotc_rodney) October 7, 2014

@rwallace8665 The feature specifically points you toward Chapter 5, indicating that the warlock chooses from the weapons normally available.

— Rodney Thompson (@wotc_rodney) October 7, 2014

@rwallace8665 Additionally, those are both intended for larger creatures (& are unwieldy for a normal PC) & have no stats of their own.

— Rodney Thompson (@wotc_rodney) October 7, 2014

@UMPIBikerMaMaCould a “High” Elf fighter with a criminal background use “mage hand” with their tools and skills? #dnd #dnd5e I'd allow it – I'd probably have it take a little longer to complete an action, maybe two actions for things that take 1

— Mike Mearls (@mikemearls) October 8, 2014

@Brail4 @JeremyECrawfordRogue attack+sneak attack v concentration. 1 damage source or two damage sources? one source

— Mike Mearls (@mikemearls) October 8, 2014