The Forgotten God

You have a pact with Tophet, who I know jack shit about. He's my dad though!
The details of the pact you inherited is unknown to you for now, but the remnants manifest themselves in ways that often result in great cost.

Expanded Spell List

Tophet lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Forgotten God Expanded Spells

SPELL LEVEL	SPELLS
1st	false life, feather fall
2nd	silence, pass without trace
3rd	zurge's elemental blade, shadowed protection
4th	speak with dead, lightning arrow
5th	life transference, mislead

The Ultimate Lifeform

At 1st level, you can use your action to unleash the divine energy within yourself, causing you to manifest aspects of your patron’s dreadful power for 1 minute or until you end the transformation as a bonus action. Once you use this ability, you gain a point of exhaustion and you cannot use it again until you finish a long rest. Additionally, the DM can force this ability to activate at a plot-convenient time ;) and you cannot resist it nor end it early.

• When you first transform, all allies within 30 feet and all enemies within 10 feet must each succeed on a Charisma saving throw or become Frightened of you. Allies have disadvantage. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
• Once during each of your turns, when you hit a creature with an attack, you can force it to make a Wisdom saving throw, and if the saving throw fails, the target is Blinded by magical darkness until the end of your next turn. You can use this feature up to twice a day.

Soul Rend

Starting at 1st level, you can pierce directly through a creature's soul. When you hit a creature with an attack and deal damage, you can choose to either change the damage type to necrotic damage or set the target's movement speed to 0 until the end of your next turn. Once you use this feature, you can’t do so again until you finish a short or long rest. 

Chaos Blast

Starting at 6th level, when you are under the effects of the Ultimate Lifeform ability, you can violently unleash the dormant magic accumulated in your body. Each creature in a 20-foot radius centered on yourself must make a Dexterity saving throw (Spell save DC + your Strength modifier). Each target takes [your total level]d6 force damage on a failed save, or half as much damage on a successful one. When you, the user, take damage, half of the hit points that you lost cannot be healed back to you, as it takes a toll on your body.

Once you use this feature, you can’t use it again until you finish 1d4 long rests. When you complete those rests, the unhealable hit points are restored.

Shadowy Instincts

Starting at 10th level, you can instinctively vanish into the darkness in response to harm. When you take damage, you can use your reaction to use your Become Shadows cantrip, halving damage and teleporting up to 60 feet to an unoccupied space you can see that is in a shadow, dim light, or darkness.

Once you use this feature, you can't use it again until you finish a long rest.

Grim Puppeteer

Starting at 14th level, you can grasp a creature's soul and briefly control their actions against their will. As an action, you target a Huge or smaller creature that has a soul within 60 feet of you. That creature must succeed on a Constitution saving throw against your spell save DC or immediately move up to half of their movement in any direction of your choice and make a single weapon attack against a creature of your choice within range. Paralyzed or Unconscious creatures automatically fail their saving throw.