Therminel's False Weakness

Upon casting this spell on a target you can see within 60 ft, they must make a constitution saving throw. On a fail, the target gets vulnerability to a type of damage of the users choice. The target may make another saving throw at the end of their turns to try to dispel this effect. On a successful save, the target is unaffected.

For each spell level above 2nd that this spell is cast, you may cast this on a additional target.