The Ancestor

Your patron is an ancestor of your bloodline to whom you are magically connected. Through magical means your ancestor has found a way to exist outside of time and space, their only connection to the physical world being you. While they retain much of their mortal personality their timeless existence has warped them to an extent, such that they may appear aloof, fickle or even mad. Your pact has allowed a fragment of your ancestor’s personality to exist within you, allowing you to communicate with them and inherit some of their power.

Twin Souls

Starting at 1st level your bond with your ancestor offers a whole other lifetime of experiences to draw from. You can choose 2 skills that you are proficient in. You now your Charisma Modifier for any checking involving these skills as your Patron's skills pass on to you. In addition, you can now tap into the experiences of your ghostly patron through your subconscious. You experience seemingly random visions from your patron's life that could relate to an experience, location, creature…etc. (at the DM’s Discretion)

Foresight

Starting at 6th level your bond to your Patron changes you, and you begin to take on some of their traits. As a reaction you can read your opponents intention, imposing a disadvantage on that roll. If the attack misses you, your next attack against the creature has advantage if you make it before the end of your next turn. This ability can be used once per long rest.

Bonded Spirits

Starting at 10th level the duality of your souls safeguards your mind, your thoughts can't be read by telepathy or other means unless you allow it. You also have resistance to psychic damage, and whenever a creature deals psychic damage to you, that creature takes the same amount of damage as you do.

Panic Room

At 14th level your connection to your patron has deepened to the point where, in order to save your life, they may pull you into a Demiplane. Upon reaching 0hp you are pulled into a Demiplane where you must remain for at least 1 hour. While in the Demiplane you heal an amount equal to your Warlock level every hour and may only leave with your patron’s permission. This ability can be used once per long rest.