Faustian Bargain

Some warlocks are not settled with simply making a deal with one force of immeasurable power and as such seek to strike a bargain with two great beings. These warlocks must be vigilant to keep balance between the powers they have borrowed or even tilt these scales when the situation benefits them. These bargains are most often made with celestials and fiends however this isn't always true, Faustian bargains can be made with any two powerful beings.

Nephilim

Also, at 1st level, as one who has made a bargain with the angelic and demonic your actions and fate are forever tied to those forces. You now have a scale of balance that ranges from -2 to +2. You start at 0. Whenever you receive advantage, whether self-imposed or otherwise, increase your balance by 1. Whenever you receive disadvantage, reduce your balance by 1. If you are at your maximum balance (+2), you cannot receive advantage from any source. If you are at minimum balance (-2), you cannot receive disadvantage. Whenever you have exactly 0 balance, you are considered “in balance”. Additionally, you can use a bonus action to grant yourself advantage or disadvantage on one attack roll, ability check, or saving throw.

Balance Trigger

At 6th level, when you are in balance you can choose not to receive advantage or disadvantage from any source once per turn. Additionally, you gain the following features;

Angel Trigger. While your balance scale is at least 2, you gain resistance to radiant damage and you can roll and regain 1d6 hit points at the end of each of your turns.

Devil Trigger. While your balance scale is at least -2, you gain resistance to necrotic damage and when you damage a creature you deal an additional 1d6 force damage.

Purchased Karma

At 10th level, when in a pinch you can always buy your fate from your patrons. Your balance scale increases to -5 to +5. Additionally, as an action, you can spend a Warlock spell slot to reduce your balance to -5, or you can gain 1 Warlock spell slot by increasing your balance to 5.

Push and Pull

At 14th level, as you grow your ability to barter power from your patrons they begin to tempt you more and more to their side. You gain the following benefits while in these respective states;

Angel Trigger. When you make an attack roll against a creature with disadvantage, you deal necrotic damage equal to the result of the higher roll to that creature.

Devil Trigger. When you make an attack roll with advantage, you can record the result of the lower roll. The next time a creature makes an attack roll against you you can replace the result with that roll before you know the original result. Additionally, while you are in balance you gain the following benefit; When a creature within 30ft. of you that you can see makes an attack roll, saving throw, or ability check with either advantage or disadvantage you can as a reaction, remove the advantage or disadvantage.

Both Sides of the Pendulum

Starting at 1st level, you learn both the infernal and celestial languages.