Transfer Essence

You temporarily sacrifice part of your own life essence to benefit another creature of your choice. 

As an action, you may reduce one of your ability scores by half, to a minimum of 3. When you do so, select 1 target that you can see within range. That target increases the same ability score by half the amount sacrificed, to a maximum of 24.

The effect on the target lasts for 1 hour. The effect on you lasts until you take a short or long rest.