Vulnerability

You point at one target within a 60 ft cone and shoot out a multi-colored-mist. The target must make a Constitution saving throw to prevent being affected by the spell. The target rolls 1d8 to determine which color of mist will affect it:

1. Red. The target is vulnerable to fire damage.
2. White. The target is vulnerable to cold damage.
3. Black. The target is vulnerable to acid damage. 
4. Green. The target is vulnerable to poison damage.
5. Blue. The target is vulnerable to lightning damage.
6. Purple. The target is vulnerable to thunder damage.
7. Brown. The target is vulnerable to bludgeoning, piercing and slashing damage.  
8. Special. The target is struck by two mists simultaneously. Roll twice more, ignoring further rolls of an 8.

If a target is resistant to the resulting damage-type, it is no longer resistant to that damage type. If a target is immune to the resulting damage-type, it is now only resistant to that damage type.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can affect one additional target for each slot level above 2nd.