Drain Attribute

You attempt to weaken a creature and drain one of its attributes of your choice. The creature must succeed on a Wisdom saving throw or have their Strength, Dexterity, Constitution, Intelligence, Wisdom, or Charisma attribute score (your choice) reduced by 2 for the duration of the spell. A creature dies if an attribute is reduced to 0. 

At Higher Levels. When you cast this spell at 3rd level, the attribute score is reduced by 3. When you cast this spell at 5th level or higher, the attribute score is reduced by 4.