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Mi-go, Starcrown

Medium plant (extraterrene), neutral evil

Armor Class 17 (natural armor)
Hit Points 85 (10d8+40)
Speed 30 ft., fly 50 ft.

14 (+2) 19 (+4) 18 (+4) 17 (+3) 14 (+2) 15 (+2)

Saving Throws Con +7, Wis +5
Skills Arcana +6, Deception +5, Perception +5, Stealth +7
Condition Immunities cold, disease
Damage Resistances bludgeoning, electricity, fire, piercing Senses blindsight 30 ft., passive Perception 15
Languages Mi-go, Giant, High Atlantean Challenge 6 (2,300 XP)


  • Horrible Appearance Any non-extraterrene creature within 30 feet that is surprised or attacked by a mi-go must make a Wis save (DC 12) or be frightened until the end of the creature’s next turn. On a successful save, the creature is immune to this ability for 1 hour.
  • Sneak Attack The mi-go deals an extra 3d6 damage when it hits a target and has tactical advantage on the attack roll or when the target is threatened by an ally of the mi-go.
  • Starflight A mi-go can survive in the void of outer space. It flies through space at incredible speeds. Exact travel times vary, but a trip within a single solar system normally takes months, while a trip between stars takes many years.


  • Multiattack. The mi-go makes two claw attacks or two force rod attacks.
  • Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d8+2 slashing damage.
  • Force Rod. Ranged Weapon Attack: +8 to hit, range 60 ft./120 ft., one target. Hit: 3d10 force damage, and the target must make a DC 15 Str or Dex save (target’s choice) or be forced prone.


This bizarre being has a roughly humanoid shape, but its body appears to be partly crustacean and partly fungal, its head is a bulbous mass of feelers, and it has two fan-like wings sprouting from its back.

Mi-go are a race of intelligent fungal creatures from the dark and fearsome world of Yuggoth. They come to the Earth to study terrestrial life, mine for valuable minerals that are hard to find on their homeworld, and especially to harvest magic in any form—usually, by searching out lost magical items or kidnapping creatures capable of using magic. In Thule, mi-go have most often been encountered in the foothills of the Starcrown Mountains, leading some to mistakenly believe the abominable creatures are native to the region.

Mi-go possess advanced science and weird, alien technology. They have been known to transplant the brains of experimental subjects into new bodies, transport instantaneously to distant planets, and build massive bases or fortifications by shaping huge masses of stone with strange devices. Why such advanced creatures are interested in earthly magic is unclear, but some sages guess that magic is a phenomenon unknown to the mi-go.

Force Rod: Many Starcrown mi-go are armed with a strange weapon known as a force rod. It resembles a two-foot rod of silver with a bell-shaped cup at one end, and fires powerful bolts of force. A typical mi-go force rod has 1d10+10 charges, and can only be used by mi-go (although a character with a good Intelligence/Arcana check may be able to make use of the device).

Section 15: Copyright Notice
Primeval Thule Campaign Setting Copyright 2021 Sasquatch Game Studio, LLC. Design Richard Baker, David Noonan, Stephen Schubert