The Blind Eyes

You have made a pact by an ancient creature that has been buried deep underground for centuries, and has learned to view the world through wisdom and magic. Your patron may be an centuries old purple worm or an mole three miles long. While you have lost most of your eyesight, you see the world in a different way, armed with the wisdom of ancient beings. 

Unyielding Gaze

Ever since you entered the pact with your patron, you have lost most of the sight from your eyes, as you can only see to a range of 10ft. However, you have gained a blindsight of 60ft. As an action, you can focus your sight, extending this range to 90ft and granting the ability to see through walls for 40ft. This lasts for one minute after which you cannot use this feature again until you take a short or long rest.

Additional Spells

You can prepare the following spells along with your normal warlock spells:

Cantrips | Mold Earth   Magic Stone 
First        | Alarm   Earth Tremor
Second  | Blindness/Deafness   Earthbind
Third      | Blink   Meld Into Stone
Fourth    | Arcane Eye   Stoneskin
Fifth       | Wall of Stone   

You also have the option to use wisdom as well as charisma as your spellcasting ability for any spell.

Predicting Stare

At 6th level, you can cast True Strike at will as a bonus action. This ability has 5 charges, after which you can take a short rest to regain 1d4-1 charges, or long rest to regain all.

Sight of the Ancients

At 10th level, your Unyielding Gaze's range extends by 30ft. While this is active, you gain a burrow speed equal to your walking speed. Finally, you can compress all your energy into one spell attack during this time. This attack can pass through walls ignoring cover, with a +3 to attack. This attack deals an additional 1d6 damage on hit. You can only use this once per activation of Unyielding Gaze.

Master of Vision

At 14th level, your Sight of the Ancients attack now has 3 charges (regain 1d4-2 on short rest), and your Predicting Stare now has a total of 10 charges (regain 2d4 on short rest)