The Intruder

Your patron is a supernatural entity, perhaps a parasite, a plague, or even a colony that has claimed your body as its host, changing and twisting you to its desire.

As a host for this abomination- think about how you acquired it, or roll on the suggested sources table below:

Roll 1d6	Symbiote source
1	I stood on a mushroom as a child, and its spores embedded themselves in my lungs.
2	The symbiote transferred itself to me from my mother during birth
3	I was part of a group that expose themselves to this entity as a rite of passage.
4	This entity was a gift from a godly being I had formed a contract with.
5	I chose to bond with the entity after discovering its power.
6	A cosmic being landed in the material plane, and I was the first one it saw.

Expanded Spell List

1st-level Intruder feature

The Intruder 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.

Fathomless Expanded Spells

Spell Level	Spells
1st	ensnaring strike, silvery barbs
2nd	alter self, tasha's mind whip
3rd	leomund's tiny hut, pulse wave
4th	polymorph, arcane eye
5th	Bigby’s hand (appears as the intruder), circle of power (appears as the intruder)

Profane Riposte

As a bonus action, you can stir-up the entity within you, throwing it into a protective rage that lasts 3 rounds. While Profane Riposte is active, the Intruder gains a reaction. It can only use this reaction to make an opportunity attack following the normal rules, and also when a creature it can see makes an attack or casts a harmful spell against you.

The attack/spell doesn't have to hit or do damage to trigger the riposte.

The Intruder has a melee range of 15ft, and deals bludgeoning damage equal to:

• 1d6 at 1st level
• 1d8 at 6th level
• 1d10 at 10th level
• 1d12 at 14th level

It uses 2 + your proficiency bonus as its modifier to hit.

If the Intruder has not used all its reactions by the start of your next turn, it will use its reactions to make attacks against the closest creatures, regardless of whether they are friend or foe. It however, will not attack the same creature twice.

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Unearthly Ministrations

6th-Level Intruder feat

At 6th level, you have grown more familiar with your Intruder, and can ask it to assist with menial tasks.

You can expend a charge of Profane Riposte to call on the Intruder in a more passive state; It has 15ft of reach, a carrying capacity of 100lbs, and can take the 'help' action when you or an ally within its reach makes a skill check. This is separate from your own help action, meaning you could potentially help two allies at once.

Profane Riposte Improvement

The Intruder now has 2 reactions instead of 1, and its riposte can now be triggered by attacks/harmful spells on allies.

In addition, if you are downed with Profane Riposte active, it will stay active and defend your body.

Vile Expansion

As a bonus action, you can assimilate with the Intruder for 5 rounds, becoming a monstrosity beyond your individual capabilities.

• Your Size becomes Large
• Your AC increases by 2
• You gain temporary HP equal to 2d6 + Your Warlock Level
• Your melee range becomes 10ft
• All your attacks now deal an extra 1d4 Psychic damage

Any enemies that saw you assimilate must make a wisdom saving throw or be frightened for 1d4 rounds.

You can use this feature once per long rest.