Aura of Vulnerability

Any creatures that come within a 10' radius of you become Vulnerable to a damage type of your choosing. 

The target must succeed on a Charisma saving throw or become Vulnerable until the spell ends. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. 

The damage types include Acid, Cold, Fire, Lightning, Necrotic, Poison, Radiant or Thunder.  

If the affected creature is Immune to the chosen damage type, the spell has no effect on them. 

If they are Resistant to the chosen damage type, their resistance is canceled out.  

If cast by a Paladin, the emanation area expands with your Paladin Aura of Protection, otherwise the default range is 10'.