@JeremyECrawford how is 'at will' spells intended too work? Can it be cast with out spending an action or bonus action?

— Nash.dewar (@DewarNash) November 2, 2015

A spell requires its normal casting time, even if you can cast it at will. #DnD https://t.co/G4ipCJgOrN

— Jeremy Crawford (@JeremyECrawford) November 2, 2015

@Eciroth it’s possible attack an enemy through an ally square with a reach weapon?
if possible, the enemy has cover or something? #dnd5e
yes, but target has cover

— Mike Mearls (@mikemearls) October 10, 2015

@richardprattDo you have concern w/ players buying 16 in ability (11 cost) IF not increased by race afterwards? Problematic? should be fine – any specific concern you have? bonuses should shore up other areas

— Mike Mearls (@mikemearls) October 14, 2015

@mikemearls PH caps buys at 15, certain class/races can get 16/17max. Wanted to give other cl/ra combos a chance at +3mod, but grp worried.

— Richard Pratt (@richardpratt) October 14, 2015

@richardprattGroup thought current setup was initial to prevent wizard/dwarf like combos from being too common/powerful. forgot that limit – it's to curb 18s, so it's ok w/o bonus

— Mike Mearls (@mikemearls) October 14, 2015

@ChrisPerkinsDnD Hey, quick question. Would height offer advantage on a ranged attack in 5e?

— Brendan (@DoctorGalactic) November 6, 2015

I would say no. https://t.co/Cfv9OoNysR

— Christopher Perkins (@ChrisPerkinsDnD) November 6, 2015

@danielceagleDoes moving away without Disengage provoke an OppyAttk if the one who is moving away is Hidden from adjacent creatures ??? no, does not provoke. attacker must be aware of target

— Mike Mearls (@mikemearls) October 14, 2015

@mahalivesIs Wild Shaped Druid immune to Charm Person, Hold Person etc. that target humanoids? yes

— Mike Mearls (@mikemearls) October 18, 2015

@mahalives Thanks–if Druid under Charm Person goes Wild Shape, does effect end?
believe no – restricts targeting, not ongoing effect

— Mike Mearls (@mikemearls) October 18, 2015

@b_coulthardThx Mike, limited space on Twitter. But, how would you handle surprise if a 3rd grp ambushed 2 groups already fighting together. 3rd group is hidden, gains advantage and related benefits, but does not actually gain surprise by mechanical definition

— Mike Mearls (@mikemearls) December 2, 2015

@b_coulthard more precisely, 3rd group rolls initiative, inserted into combat order, starts out hidden

— Mike Mearls (@mikemearls) December 2, 2015

@b_coulthardThx for your reply. This mechanic feels wrong to me as a long time DM. Why not allow surprise, ambushers lose valuable options? surprise applies to someone not currently engaged in a fight – otherwise, any instance of hiding would trigger it

— Mike Mearls (@mikemearls) December 2, 2015