Vessel

A half-orc wanders further into the cave, stepping over the bones of adventurers who fell to the poison traps from before. He walks deeper into the cavern, and holds his torch out in front of him, illuminating the form of a massive chained beast. He hears a voice in his head "What is it that you seek, lone wanderer?"

Quick Build

---

You can quickly create a vessel by following these suggestions. First, Charisma should be your highest ability score, followed by strength or dexterity.

Class Name

Level	Proficiency Bonus	Features	Spells Known	1st	2nd	3rd	4th	5th
1st	+2	Entity Within, Flesh Bud	—	—	—	—	—	—
2nd	+2	Spellcasting, Organic Weapon	3	2	—	—	—	—
3rd	+2	─	3	3	—	—	—	—
4th	+2	Ability Score Improvement	4	3	─	─	─	─
5th	+3	Extra Attack	5	4	2	─	─	─
6th	+3	Handy Helper	5	4	2	─	─	─
7th	+3	─	6	4	3	─	─	─
8th	+3	Ability Score Improvement	6	4	3	─	─	─
9th	+4	─	7	4	3	2	─	─
10th	+4	Unnatural Overload	7	4	3	2	─	─
11th	+4	Improved Buds	8	4	3	2	─	─
12th	+4	Ability Score Improvement	9	4	3	3	─	─
13th	+5	─	10	4	3	3	─	─
14th	+5	─	11	4	3	3	1	─
15th	+5	Arcane Entity	12	4	3	3	1	─
16th	+5	Ability Score Improvement	13	4	3	3	2	─
17th	+6	─	14	4	3	3	2	1
18th	+6	Perfect Symbiosis	15	4	3	3	3	1
19th	+6	Ability Score Improvement	16	4	3	3	3	2
20th	+6	Entity Takeover	17	4	3	3	3	2

Class Features

As a vessel, you gain the following class features

Polearm

When a creature hits you, you may use a Flesh Bud charge as a reaction to:

• Add your spellcasting modifier to AC,
• Immediately make one Organic Weapon attack against them.

Ability Score Improvement

When you reach 4th level, and again at 8th, 12th, 16th, and 19th level, you can increase one ability score of your choice by 2, or you can increase two ability scores of your choice by 1. As normal, you can’t increase an ability score above 20 using this feature.

Using the optional feats rule, you can forgo taking this feature to take a feat of your choice instead.

Extra Attack

Beginning at 5th level, you can attack twice, instead of once, whenever you take the Attack action on your turn.

Handy Helper

Starting at 6th level, when you make a skill check that can be aided, your entity automatically aids you, giving you advantage.

Unnatural Overload

Starting at 10th level, you may choose to enter an unnatural overload, enhancing your organic weapon and flesh buds. This state lasts for 1 minute, and may be performed once per long rest. You gain the following benefits:

• All Organic Weapons gain one additional dice
• All Flesh Bud saves suffer disadvantage
• Your movement speed increases by 10 ft
• You gain temporary HP = vessel level + spellcasting modifier

Improved Buds

Starting at 11th level, when a creature succeeds on the saving throw to resist your flesh bud, the flesh bud does not die and attempts to affect them on the start of your next turn again. This feature only works once per flesh bud. Additionally, you may use the detonation feature even if they succeed, however it deals half damage.

Spirit Casting

Beginning at 15th level, your entity may cast some spells for you.

• Uses your spell attack and save DC
• Can cast spells without verbal, somatic, or material components
• Range of the spell doubles
• Uses: PB

Perfect Symbiosis

Beginning at 18th level, You can freely shift your Organic Weapon between all four types at the start of your turn.

While in Overload, your Organic Weapon does not add one dice, but instead triples the number of dice.

Entity Takeover

At level 20 you can allow the entity to completely take control of your body. While in Full Entity Form, you are unable to make any decisions, however the entity is empowered. You gain advantage on all attack rolls and saving throws, and your movement speed increases by 30.

Entities

Now you'll have to choose which type of entity infiltrates your body

Cosmic Horror

Beings in the outer reaches of the Astral Plane have strange abilities beyond the understanding of even the most intelligent scholars.

Young Cosmic Horror

Starting at 1st level, you augment your current capabilities with the ability to cast spells.

Cantrip You learn two cantrips of your choice from the Cosmic Horror spell list. You learn an additional Cosmic Horror cantrip of your choice at 10th level

Spellcasting Ability Charisma is your spellcasting ability for your Cosmic Horror spells, since you learn your spells through your entity. You use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw for a vessel spell you cast and when making an attack roll with one.

Spell Save DC = 8 + your proficiency bonus + your Charisma modifier

Spell Attack Modifier = your proficiency bonus + your Charisma modifier

Astral Bud

Starting at 3rd level, when your flesh bud infects a creature, you can always sense where they are, and you may detect their surface thoughts as if they are under the effect of the Detect Thoughts spell

Cosmic Core

Starting at 7th level, choose between 3 types of celestial bodies. The choice you make will effect how your entity will look inside of you, and give you certain benefits.

Star Your base movement speed increases by 10 feet

Planet You gain +1 AC

Asteroid You gain resistance to fire damage

Celestial Sight

Starting at 14th level, you gain the ability to use the sight of your entity. You can activate this feature once per long rest, and it lasts for 5 minutes. In this state you can see through walls and objects. You may also cast detect thoughts at will, and you may delve deeper into their thoughts without them noticing.

Demonic Fiend

Deep in the bowls of hell, certain entities lurk and stalk, waiting for a time to rise up and take souls as they please.

Young Demonic Fiend

Starting at 1st level, you augment your current capabilities with the ability to cast spells.

Cantrip You learn two cantrips of your choice from the Demonic Fiend spell list. You learn an additional Demonic Fiend cantrip of your choice at 10th level

Spellcasting Ability Charisma is your spellcasting ability for your Demonic Fiend spells, since you learn your spells through your entity. You use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw for a vessel spell you cast and when making an attack roll with one.

Spell Save DC = 8 + your proficiency bonus + your Charisma modifier

Spell Attack Modifier = your proficiency bonus + your Charisma modifier

Hellish Bud

Starting at 3rd level, when your flesh bud infects a creature, you mark them with a brand of the scorch. Next time you hit them with a spell attack that deals fire damage, you may roll an extra damage dice as if you cast the spell at 1 level higher.

Burning Core

Starting at 7th level, your heart is fully covered by the hellish beast within. You gain resistance to fire damage and you gain the ability to control flames as if you cast the Control Flames spell.

Circles of Hell

Starting at 14th level, you may expend spell slots in order to form circles of hell. For each level of the spell slot add an additional circle. For each circle formed, any fire damage dealt adds an extra damage die.

Arcane Tyrant

A magical being, forged through studying the many arcane texts of the world. Whether the entity is a being forged through magic, or one merely changed by it, regardless, they are powerful.

Arcane Bud

Starting at 3rd level, when your flesh bud infects a creature, you mark them with a brand of the magus. The next cantrip you cast is guaranteed to hit the target.

Magical Core

Starting at 7th level, runes become inscribed upon your veins. You gain advantage on saving throws against magical effects, and you gain 1 cantrip from the wizard spell list of your choice.

Mystical Chaos

Starting at 14th level, when casting a spell you may choose to activate a mystical chaos rune upon your spell. This will cause one of three things. Either your spell doubles in damage, the damage type changes, or the spell halves in damage. You may use this feature once per long rest.

Cosmic Horror Spells

Hellish Fiend Spells

Arcane Tyrant