No. You get to wait to see if the attack would hit you. So the clear intent here is the use it after the attack roll so you know whether or not you’ve been hit.
Can you shield an attack you can’t see 5e?
The shield spell does not require you to see your attacker So you can cast shield even after being hit by and invisible attacker and that same hit can be turned into a miss.
Can you use a bonus action as a reaction?
No general rule allows you to insert a bonus action between attacks in a single action. You can interrupt a multiple-attack action with a bonus action/reaction only if the trigger of the bonus action/reaction is an attack, rather than the action.
Can you cast shield on yourself?
Is it possible to cast Shield on yourself if you don’t see the attack coming, e.g. are blinded? The spell doesn’t mention sight, so presumably yes. Specifically if you’re suprised, then no, since you can’t take reactions.
When do you cast a reaction spell in shield?
Reaction spells are cast as a reaction in response to a trigger that is spelled out in the spell description. In the case of shield, that trigger is “when you are hit by an attack or targeted by the magic missile spell”. When that triggers occurs, you can cast the spell and spend the spell slot at that time to do it.
Do you have to cast Shield prior to your opponent?
The entry for Shield says that the reaction is triggered by being hit by an attack, which would tend to imply that you can wait to see if your opponent actually succeeds on their attack roll (otherwise they would not be hitting you with their attack) to beat your AC before deciding whether or not to cast the spell.
Can a wizard shield himself from a blow?
The Wizard has his reaction and can Shield from the blow. Provided that Shield will be enough. Furthermore, the Wizard knows the roll that was made against his AC and can safely use Shield so that his spell slot will not be expended in a wasted effort.
How long does it take to cast Shield in RuneScape?
Shield’s casting time is 1 reaction, which you take when you are hit by an attack or targeted by the Magic Missile spell. Until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack, and you take no damage from magic missile.” The wizard is arguing that the RAW is any attack that hits him.
