A small parasite that takes over hosts to reproduce.

They say you give up a few things, chasing a dream. In those mists that's the literal truth, for every dream of yours that comes true, a piece of yourself, mind, body, or soul, gets taken by the mist. Worst part is, you won't even know what the cost of your dreams are until you go to leave, and by then you might not even have a mind left to change...

A fragment of the mists of creation, drawn to those desperate to make their dreams come true. Suitable for any magical fantasy setting.

Renaming the standard fantasy golem, seven replacement terms

A Tree of Light hidden in the Darkness, vast and unknowable.

Goblins for the Goblin Throne

A Guild of Technomancers Experiment taking place in an undisclosed location to create robotic elven warriors with severed heads as the brains. For use in a Lord of the Rings setting.

An experiment on the creation of a humanoid who's blood turns into a deadly nerve gas upon exposure to oxygen. Being conducted in Special Research Facility No. 731. For use in the Legend of the Five Rings RPG.

An Emissary is an artificial human being that has been completely assembled/grown by a non-human interest or power

A tree bearing sickening fruit, a thing of horror turning its victims into undead servants.

We made a mistake, we assumed they were normal goblins, short and cranky as they were. We thought the horns were some sort of decoration or one of their fetishes. The horns were attached and they were much more than mundane grots. They were hell grots. 

Adding a little unexpected to your magic bag of critters or the like.

The Usagin is a high end biomod that is a popular niche product in the Cosmic Era. The dedication required to become a bunnyperson is serious, as some of the mods are invasive and make some common tech devices no longer operational for the usagin.

A way to increase the danger of a monster through an unusual mechanic

The most common domestic companion animal of the Kel'Regar, the Kel'Mestath has been bred into a wide variety of sizes and roles. Humans and their allied species often think of them as similar to cats or dogs, a perspective that the Kel usually encourage, for the full understanding of the Mestath tends to cause a certain level of discomfort in many aliens, but especially that close ally, humans.

also known as a great goblin, dread goblin, or super goblin

A golem that packs a surprise!

Or Bearshrews if you prefer. The debate rages on among naturalists. Both names are used interchangeably for these creatures.

Seriously - why hasn't one or another Artificial Intelligence simply taken over? In any setting that is in a close or more distant future, the possibility of a machine that is able to learn and grow without biological restraints brings up the question.

Monsters designed for O&D but could easily be used for other games. A bare bones Bestiary.

Also known as lemures or ghouls, Mage Eaters are a thankfully rare entities