@JeremyECrawford Vampire turns into Mist form due to falling to 0 HP: is it a polymorph effect and as such can it be dispelled?
— Chris (@ratsenib) April 9, 2017
Dispel magic ends spells. A vampire isn't casting a spell when it turns into mist, so dispel magic has no effect on it. #DnD https://t.co/Be5q7270b8
— Jeremy Crawford (@JeremyECrawford) April 9, 2017