@JeremyECrawford A creature casts shocking grasp on a Mage Slayer PC. If the PC reacts to the spell being "cast," does he get his reaction?

— Easy Lee (@Easy_Lee_123) May 29, 2015

Mage Slayer doesn't specify timing, and a reaction without special timing occurs after its trigger (DMG, 252). https://t.co/tcTTpp93cZ

— Jeremy Crawford (@JeremyECrawford) May 30, 2015

@JeremyECrawford Reactions are not an "instant response," per PHB190? My group thought reactions are simultaneous based on the description.

— Easy Lee (@Easy_Lee_123) May 30, 2015

@Easy_Lee_123 Check out the Dungeon Master's Guide (p. 252), where adjudicating reactions is explained for the DM.

— Jeremy Crawford (@JeremyECrawford) May 30, 2015

@Easy_Lee_123K, then the rule in the DMG conflicts with the PHB, or the PHB is missing text that explains timing. Will this be errata’d? The PH and DMG rely on everyday English here. A response/reaction comes after something else. "Instant" means right away.

— Jeremy Crawford (@JeremyECrawford) May 31, 2015

@KDurahan@JeremyECrawford do i declare targets for all extra attacks before rolling or can i choose targets after each individual attack? You can pick your target before each attack.

— Jeremy Crawford (@JeremyECrawford) May 29, 2015

@magalor42druid multiclass monk, unarmored defense apply to wildshape? ex wolf 13 nat ac +its dex mod and druid wis mod?
not in my opinion – natural armor counts as armor. use higher of base 10 + mods or form AC

— Mike Mearls (@mikemearls) May 25, 2015

@eightspancrow @JeremyECrawfordIs it meant for the grappling rules to let you grapple 2 creatures at once,as long as you have both hands free?
believe so, yes

— Mike Mearls (@mikemearls) May 25, 2015

@SkullramaMetamagic: Twinned spell. Does the spell now count as two separate spells, or one spell now with two targets? one spell, two targets IIRC

— Mike Mearls (@mikemearls) May 25, 2015

@khersheyjrHow are the official conversions for older editions to 5e coming along or are they? big issue for us is completing QA on them – we don't want to release docs that need revision

— Mike Mearls (@mikemearls) May 25, 2015