Hex Soul

You are particularly gifted in the use of the spell Hex and gain several benefits.

First you gain 1 point of Charisma to a maximum of 20

Additionally you can cast hex once per long rest at your pact magic level without using a Pact Magic slot.  

When you cast hex in this way or by using a Pact Magic slot, only the initial casting requires the use of a bonus action.  Re-assigning the hex after the initial casting can be done as a free action. 

And finally, when you are able to cast Pact Magic spells at third level, your casting of Hex no longer requires concentration.