Bestow Vulnerability

You choose a creature within range and choose a damage type, For the duration, the target has vulnerability to the chosen damage.

If the target has resistance to the chosen damage, it no longer has resistance for the duration. The spell has no effect if the creature has immunity to the chosen damage.

Using a Higher-Level Spell Slot. You can target one additional creature for each spell slot level above 2. You can choose a different damage type for each target.