My sorcerer casts magic missile. He has 3 projectiles he can target up to 3 creatures. Must I declare the target of all missiles at once then resolve damage / shield / immunities, or can I shoot one, roll damage, shoot another (at the same target or another target), roll, and so on?
Must I declare the target of all magic missile projectiles at once, or can I shoot them one at a time (in the same action) resolving damage for one missile before using the next one?
Looking for textual RAW or RAI references. It is assumed that the DM can set a ruling one way or the other disregarding the text, so we don't need to address the Golden Rule.