If an Open Hand Monk hits a creature with the shield spell prepared and uses it's Open Hand Technique feature to stop it from using reactions until the end of the Monk's next turn, would the creature be able to cast shield to cancel the attack?
I believe that the reaction kicks in before the attack, but Jeremy will have a definitive ruling
— Mike Mearls (@mikemearls) May 30, 2018
Shield spell—its description says it works against the triggering attack, which means it can cause that attack to miss. If the attack has a special effect that relies on it hitting, that effect doesn't occur if the attack is turned into a miss. #DnD https://t.co/WHZDbQb9vz
— Jeremy Crawford (@JeremyECrawford) May 30, 2018