Heart of Darkness

A being of literal and not necessarily figurative darkness has reached out to you and lends you power.

Dark Sight

Beginning at 1st level when you choose this patron, your eyesight is permanently affected. Your sight reacts to light as though it were darkness and darkness as though it were light. Actions made in direct sunlight or bright light that rely on sight are made with disadvantage and you can only see up to 120 feet bright light. Objects in shadows appear to you as though glowing. However, you can see in darkness as though it were bright light (for a normal person). Dim light imposes no disadvantage. 

Misty Anchor

At 1st level, you gain the ability to place invisible markers that enhance your teleportation abilities. As a bonus action, you can place an invisible sigil on an object or creature you touch. That sigil acts as a Misty Anchor, and whenever you cast the spell Misty Step you may ignore the range and instead appear in any uninhabited space within 5 feet of the sigil. If you can see the Misty Anchor whenever you utilize it, you may choose the space in which you appear. Otherwise the DM chooses randomly. If there is no uninhabited space next to the sigil, the spell fails and you take 3d10 force damage.

In addition, you gain the ability to utilize a Misty Anchor without expending a spell slot. Once you have used this ability an amount of times equal to your warlock level, you cannot use it again until you complete a short or long rest.

Heart Sense

At 6th level, you gain a limited ability to understand the desires of those around you. As an action, you can hear the current desires of creatures as though through the detect thoughts spell.

Manifest Darkness

Starting at 10th level, your darkness can enhance some of your spells. Whenever you cast a pact magic spell, you may double the numeric effects of the spell. Once you use this ability, you may not use it again until you complete a short or long rest.

In addition, you may use your magic to imitate the effects of the Mage Hand cantrip on a greater scale. Either multiply the range and carrying capacity of Mage Hand by your Charisma modifier (min. 2) or simultaneously puppet an amount of Mage Hands equal to your Charisma modifier (min. 2).

Web of Darkness

At 14th level, the connections between your Misty Anchors form a web that you can utilize. When you use a Misty Anchor, you can bring up to 8 willing creature with you. An unwilling creature makes a wisdom saving throw against your spell save DC, and on a failure they too are teleported with you.

Alternatively, you can use your use of a Misty Anchor to send someone else instead of yourself. An unwilling creature makes a wisdom saving throw against your spell save DC, and on a failure they are teleported in your place. On a success, you are teleported instead.