I'm going to be a first-time DM in a few weeks DMing for some new players who will not necessarily be reading the rules. Because of this, I'm trying to get a good grasp on as much of the free material as possible.
My question is whether or not it is possible in combat to ready an action such as, "If an Archer fires an arrow at our wizard, move in front of them to block the arrow." This seems reasonable because they are simply moving. The Basic Player Handbook states the following for the action Ready.
First, you decide what perceivable circumstance will trigger your reaction. Then, you choose the action you will take in response to that trigger, or you choose to move up to your speed in response to it.
In this case, the trigger is the fired arrow, and the action is movement. So the action seems OK, assuming they haven't used up their movement during their last turn.
My question is, as a DM, should I allow them to intercept an arrow and take damage instead? I think it might be important to say that we will not be using a grid for battle.
I think it wouldn't be unreasonable to have this be a valid action, and that they could take damage in place of the initial target; however, the rules about cover state:
if a target is behind a creature that gives half cover
which gives a character +2 AC and bonus on dex saving throws. Which leads me to believe that this would not be possible.
So I would allow the action to happen, but should it be resolved via cover or via an interception?