Does the Artificer’s level 6 “Alechmical Mastery” apply to the Arcane Weapon spell? Alchemical Mastery applies to one roll of a spell, so it can apply to one roll of the arcane weapon spell that deals acid or poison damage.
— Jeremy Crawford (@JeremyECrawford) March 9, 2019
Would that bonus apply to arcane weapon once per cast, or once per turn?