The Greater Mimic

Your patron is a small unassuming glove or gauntlet, at least, that is what others see. Underneath the surface is a shapeless mound of flesh and teeth consuming you as you harnes its power. The glove is a Mimic, a tricky shapeshifter that was imbued with great power. Power that it lends to its host in a truly symbiotic way. It is unknown how these Mimics came to be, but is't safe to assume that once paired, the host will never be rid of the parasite.

Expanded Spell List

The Greater Mimic 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.

Fiend Expanded Spells

Spell Level	Spells
1st	disguise self, hideous laughter
2nd	blindness/deafness, heat metal
3rd	tiny hut, vampiric touch
4th	secret chest, polymorph
5th	contagion, dominate person

Mimic Symbiosis

Starting at 1st level, you may choose to, as a bonus action, allow your mimic to feed on you. Doing so reduces your maximum hit points by 1d4 x half your warlock level until you wake from a long rest. On a day wherein you have allowed your mimic to feed on you your unarmed strikes are empowered, your unarmed strikes damage increase to 1d6 + your charisma modifier, and you may use your charisma in place of strength or dexterity to determine your attack bonus.

 

Also, as long as you are conscious you may add your charisma modifier to; Dexterity (Slight of Hand) checks, Strength (Grapple) Checks, and Strength checks  to push pull or lift things.

Monstrous Development

Starting at 6th level, you gain two monstrous abilities. You may utilize the Mimic's tongue in order to gain reach on your unarmed attacks as well as dealing acid damage. You also gain the ability to shape-shift into an inanimate object once per day.

Parasitic Protection

Starting at 10th level, your connection with this parasite has only gotten stronger, and as it develops, the mimic grants additional aid to its host. The mimic grants you blindsight, and you may add your charisma modifier to your passive perception.

True Symbiote

Starting at 14th level, you gain a parry reaction equal to your charisma modifier. You may use this reaction once per round in place of any other reactions. You are also immune to being stunned, even while asleep.