Homebrew Eidolon Species Details

A host. That is the only purpose of a Vampyric Parasite. They search for a host their entire lives, some of them jumping between around 70 hosts in their life. These parasites do not die of natural causes, but can be killed, but not without killing the host too. These parasites dwell in the lower realms, and it is rare to see them in Aebulas, but not unheard of. When they crawl from Tartarus for the first time, they are not very intelligent, and because of this most die early on, unless taken under the care of a Vindicate: the title given to an old Vampyric Parasites, who have become intelligent and cunning. These parasites take control of a host by ripping open their chest and burrowing into the heart. Once there they slowly take control of the host until that host is no more, and they become a Husk. Husks retain all memories of the host, and have been known to use it to torture the hosts loved ones, before eating them or bringing another parasite to use them. Once the parasite enters a host, it usually takes around a week to take full control, but the particularly strong willed hosts have incredibly rarely been known to fight down the parasite, and to exist as an Eidolon, now with the added bonuses of another lifeform. However, this isn't all good, as the host is forced to drink blood regularly to not lose control, and become a part of the Husks. Eidolons are left with giant scars on their chest from where the creature burrowed in, as well as red eyes and sharpened teeth. They become faster and stronger, as well as more ruthless if they don't learn to control the parasite within, however they are weaker in the sunlight, but they don't burn up like in legends. Eidolons also become weaker when exposed to holy symbols or anything with holy semblance, such as someone speaking Celestial, or holy water. However, at night they become stronger than the host would ever have originally been.

Eidolon Traits

A host who controls their parasite, until it learns to control them...

Night Sense

At night, an Eidolon's passive perception will rise by 6, and they will gain advantage on perception checks.

Bloodthirst

When an Eidolon smells blood, they must make a wisdom saving throw of 12 minus their modifier, or else enter Bloodthirst mode, and immediately attempt to drink the blood. When in this mode, the Eidolon will gain advantage on strength rolls, but disadvantage on wisdom rolls. The player may attempt to leave this mode by rolling another wisdom saving at disadvantage.

Vampyric Heartbeat

Because of the parasite inside of you, you are able to move faster and be stronger than you were before.

Master of the blade

Thanks to your parasitic friend inside you, you have gained the ability to use any close range weapon, despite the size of your character. This partners well with a Husks Armament.

My not so distant past...

The Eidolon retains all past traits from the previous race that don't pertain to something holy that calls on a god that has a good or neutral alignment. They cannot however learn any traits that would have been acquired by their previous race at a higher level. 

Enemy of the Holy

The Eidolon will lose any pacts with God's of a neutral or good alignment, as well as any traits that rely on them, such as Ki.

Slowed Aging

An Eidolon will age 10x slower than the host would have before. So 10 Eidolon years in age, is equal to one human year of age.

Bloodsuckers

When an Eidolon drinks blood, it not only allows them to keep control over their parasite, but will also grant them a small amount of temporary HP, decided by the Dungeon Master. At Level 6, the Eidolon can also use blood drinking to add temporary advantage on strength rolls and hit rolls.

Sunlight's Limit

Whilst exposed to sunlight, the Eidolon is slowed to their characters original speed, as well as having to roll disadvantage on Athletics and Acrobatics.

Natural Gymnist

The Eidolon now has a proficiency in Acrobatics and Athletics.