Temporal Liability

One target creature of your choice that you can see within range must make a Constitution saving throw. If the target fails this saving throw, they are now vulnerable to an element of your choice, (ex. Acid, Poison, Ice, Fire) and take 2x damage from attacks of the same type. Creatures with an immunity are now weakened and take half damage dealt if immune element is chosen.

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.