Out of all the planes there is one that is known as pure evil. A plane that consumes and grows with each person that ends up there. A plane that is muttered with hushed lips. A plane of eternal darkness. For some reason you have reached out to the Abyss and the Abyss answered. Your pact could be one of the Abyssal Titans that rule the plane. Or one of the generals of the Abyss. Whatever it may be, you recognized the risk and the reward was well worth it.

Pact Spells

1st- Dissonant Whispers, Abyssal Rebuke

2nd- Crown of Madness, Phantasmal Force

3rd- Fear, Summon Abyssal Spawn

4th- Phantasmal killer, Shadow of Moil

5th- Synaptic Static, Contagion

Dark Pact

At level one the Abyss notices you're willing to spread its darkness to others. After you hit with a spell that causes damage you can force that target to make a save against your spell Dc. On failure that target is under the Abyssal frenzy condition, however you have control over that target and can command it to do actions on its turn. However if it does not attack a target with-in its turn it will target itself. You have control over the target equal to your proficiency bonus in turns. (Example at level 1 it would be 2). You can only control one target at a time and you can use this up to your charisma modifier per long rest.

Dark Hunger

At level 6 you feed upon the very essence of life itself. When you are targeted with a spell that does damage you can use your reaction to cause disadvantage on the roll. If the target misses, you gain Advantage on your next spell attack and gain temp hp equal to your warlock level + the spell level with a minimum of one. (Example 6+1 for 7 temp hp) you may use this once per long rest or use a spell slot of 1 or higher to use it again.

Abyssal Resistance

Your hunger has made the Abyssal beings happy and with that you are granted resistances. At 10th level you gain resistance to Abyssal damage and advantage on saves against magic that charm you. Additionally you are immune to the Abyssal frenzy condition.

Abyssal Warlord

The Abyss has given you power, so much power and you are not satisfied. At level 14 you enter a state between a mortal and an Abyssal warlord. This form lasts for 10 minutes and grants you the following effects.

Your dark pact skill allows you to have 2 creatures instead of 1 and when they die they give you hp equal to 1d8+your level

You may use your Dark Hunger ability 1 additional time.

The damage you do is an extra 2d8 abyssal damage.