0 damage resistance
@JeremyECrawford If you have resistance to a specific damage type and then take 1 damage of that type, do you take 1 or 0 damage? #dnd — Tim Eagon (@Tim_Eagon) May 20, 2015 You take 0 damage. Always round down, unless something in the game says otherwise. https://t.co/BCXqIv0wtW — Jeremy Crawford (@JeremyECrawford) June 3, 2015