@NiCk_DawnfallA vampire can automatically hit a grappled target, that condition excludes an attack roll? no criticals possible? Which vampire ability are you referring to?
— Jeremy Crawford (@JeremyECrawford) April 26, 2017
@NiCk_Dawnfall @JeremyECrawford No, Bite says the target must be be "a creature that is grappled by the vampire" (among other things). It doesn't say you don't need to roll
— Armando Doval (@armando_doval) April 27, 2017
@armando_doval @NiCk_Dawnfall Armando is correct.
— Jeremy Crawford (@JeremyECrawford) April 27, 2017