4 Mutant Hyaenodons...

Viewable on Referees' Resources, are the DM-eyes-only details of half of the hexes of the Iridium Plateau Hexmap. A couple of short excerpts:

XXXX: The hunting grounds of 4 Mutant Hyaenodons (HP:27, 15, 25, 24) with writhing worms-like tentacles (2 additional attacks for 1-4 damage) growing out of their backs.

XXXX: This foul spire is rotten throughout it's mass with massive slimy tunnels bored by uncounted legions of blotchy, albino Purple Worms that thrive on the unique sentient ores and crystals that permeate this mountain. These living minerals are an important component for constructing certain positronic thinking-engines.

5 Miserable Pilgrims

Over on Referees' Resources is a post detailing more hexes of the Iridium Plateau Map.

"xxxx: In a dismal salt-slab hut cower 5 miserable Pilgrims. They are waiting for their master, who went on a mystic journey into the Prismatic Salt Wastes and has not returned."

Invasion of the Maggot People

New Planet Algol monsters "The Maggot People" are detailed here on Referees' Resources.