The Devourer

Your patron is a powerful entity known as a Tychilarius, a tremendous aberration that seems to be a singular creature that is made up of thousands of other individual creatures fused into one horrific organism with a united intelligence. It is said that Tychilarius was birthed from a black hole into which millions of foul creatures had been pulled. They were ripped apart into mere particles and reassembled into the terror incarnate that was somehow ejected from the oblivion within the black hole. This horrifying host of tentacles, some tipped with eyes, and others ending in mouths, has a body made of a massive spiraling maw ringed with thousands of teeth. The Devourer is believed to be immortal, and has traveled throughout the cosmos. 

Expanded Spell List: A Tychilarius Patron 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.

• 0lvl: Ghost Sound, Haunted Fey Aspect;

• 1st: Ventriloquism, Lesser Confusion;

• 2nd: Invisibility, Plague Carrier;

• 3rd: Blink, Babble;

• 4th: Confusion, Wandering Star Motes;

• 5th: Passwall, Feeblemind;

• 6th: Programmed Image, Antimagic Field;

Pact Magic: Touch of Chaos (Sp):You can imbue a target with chaos as a melee touch attack. For the next round, anytime the target rolls a d20, it must roll twice and take the less favorable result. You can use this ability a number of times per day equal to 3 + your Charisma modifier.

Awakened Mind(Sp): Starting at 1st level, your alien knowledge gives you the ability to touch the minds of other creatures. You can communicate telepathically with any creature you can see within 30 feet of you. You don't need to share a language with the creature for it to understand your telepathic utterances, but the creature must be able to understand at least one language. Creatures with more than twice the Hit Dice of your Warlock level are unaffected. You can use this ability a number of times per day equal to 3 + your Charisma modifier.

Entropic Ward(Sp): At 6th level, you learn to magically ward yourself against attack and to turn an enemy's failed strike into good luck for yourself. When a creature makes an attack roll against you, you can use your reaction to impose disadvantage on that roll. If the attack misses you, on your next attack roll against that creature roll twice and take the higher result, must be before the end of your next turn. You can use this ability once per day, and one additional time per day for every 3 levels of warlock after 6th. 

Thought Shield(Sp): Starting at 10th level, your thoughts can't be read by telepathy or other means unless you allow it. You also have resistance to psychic damage, and whenever a creature deals psychic damage to you, that creature takes the same amount of damage that you do. You can use this ability once per day, and one additional time per day for every 3 levels of warlock after 10th. 

Create Thrall(Sp): At 14th level, you gain the ability to infect a humanoid's mind with the alien magic of your patron. You can use your action to touch an incapacitated humanoid it must make a Wisdom saving throw against DC 10 + your warlock lvl + you Charisma Modifier. If the creature fails it is then charmed by you until a Remove Curse spell is cast on it, the charmed condition is removed from it, or you use this feature again. You can communicate telepathically with the charmed creature as long as the two of you are on the same plane of existence. You can use this ability once per day, and one additional time per day for every 3 levels of warlock after 14th.