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

Behold, a magical pig

A highly underrated and underused extremely low level monster, adapted and updated for the Saerith setting

A form off plasmic organism, a virmitrix is neither plant, animal, of fungus, but elements of all of these and none of them.

Magnatheans are a transcendent form of demi-human life, and a disaster for humanity, waiting to happen

A type of combat oriented synthetic lifeform, specificially engineered to counter supersoldiers, martial artists, and infantry forces

'Where the hell did that come from'

No one is really sure what a Xamek is, or if they even exist

Cyber-Satyrs are an uncommon but increasingly popular sexual/charisma based cyber and genetic modification profile