Weapon of Warning

You choose a creature you can see within range and mark them for retribution, a weapon of radiant light appears over the target.

After the next spell cast or attack made by the target as an action/bonus action/reaction, or after 1 minute, the weapon strikes them and disappears. The target takes 2d6 radiant damage, and must succeed on a Dexterity saving throw or be stunned until the end of their next turn.

If the target drops to 0 hit points before they are struck by their weapon, you can use a bonus action on a subsequent turn of yours to mark a new creature.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.