From publisher blurb:
Essential Enemies 1: Things From Beyond is a third party monster manual for use with Old-School Essentials and other old school fantasy role-playing games.
This zine contains the following monsters:
Astral Paladin: A mounted knight from a far-away world, summoned here to do a noble’s bidding.
Building Blocks: Cubic workers brought here to mine a magically poisonous metal.
The Crystal Kingdom: The domain of the crystal men spreads across the face of this world, consuming all before it.
The Firehorse: The spirit of living fire, trapped in a blind body of flesh.
The Iridescents: Floating spheres that poison the earth and lead to desperate cannibal behaviour.
The Light Collector: It started a cult to get its greedy tentacles on new sources of light.
The Mung Mung: Transdimensional merchants of oddities and other creatures.
Tentacle Men: They might look like men, but they are mostly tentacles.
All monsters in this zine were taken from the Monthly Monsters patreon project.
Content Warnings: Aside from its contents mostly consisting of violent monsters that are hostile to humans, this book also contains mention of cult activity, human transformation, magical coercion (of monsters), magical experiments (upon monsters), magical imprisonment, magical insanity, radiation poisoning, the wearing of flayed human skins, and the trafficking (by monsters) of body parts, enslaved beings, and memories.