The Slowest Thing That Kills

A Tiefling warlock once sought forbidden knowledge beyond the veil of reality, performing a ritual in desperation to escape their mortal limitations, only to accidentally tear open a doorway to a realm where time moves like congealing tar and hunger is the only constant. Through this breach stepped an entity so fundamentally alien that the mind refuses to perceive it—a predator of pure malevolence that exists in the spaces between sight and madness, draining its prey's vitality and consciousness with glacial patience until nothing remains but a hollow husk. The Tiefling became its first vessel, their body a puppet through which the creature learned the rhythms of this world, each movement jerky and unnatural as the entity puppeteered its stolen flesh. As the infection spread through bites and the implantation of parasitic eggs within the living, the warlock's chaotic nature twisted their purpose: they began to understand their role not as victim but as instrument, neither fully resisting nor fully surrendering to the symbiosis. The creature feeds faster now with each new host, growing stronger and more coordinated, while the Tiefling walks the line between consciousness and possession, sometimes wondering if they're guiding the entity toward specific prey or if they've simply become its most effective hunting tool. What began as a search for transcendence became something far worse—a bridge between worlds, and a warlock who can no longer remember which side of the veil they truly belong to.

Strength

14, modifier +2

Dexterity

18, modifier +4

Constitution

20, modifier +5

Intelligence

16, modifier +3

Wisdom

12, modifier +1

Charisma

15, modifier +2

Consume Sanity

Target must succeed on a DC 15 Wisdom saving throw or take 4d8 psychic damage and become frightened for 1 minute.

Possess Host

If the target is reduced to 0 hit points, the entity can possess it, becoming a zombie-like creature under its control.

Infecting Bite

Make a melee attack against a creature. On a hit, the target takes 2d10 necrotic damage and must succeed on a DC 15 Constitution saving throw or become infected with parasitic eggs.

Invisibility of Madness

The entity is invisible and cannot be perceived unless it chooses to reveal itself.

Hunger of the Void

The creature drains 1d6 sanity from any creature within 30 feet at the start of its turn.

strength

+5

dexterity

+7

intelligence

+6

wisdom

+4

Psychic

Necrotic