Frost Corpse

Medium undead, neutral evil

Armor Class 17 (mail cuirass)
Hit Points 76 (8d8+40)
Speed 30 ft.

17 (+3) 14 (+2) 20 (+5) 5 (-3) 13 (+1) 10 (+0)

Damage Immunities cold
Senses passive Perception 11
Languages Nimothan, Low Atlantean
Challenge 8 (3,900 XP)


  • Cold Aura A creature that ends its turn adjacent to the frost corpse takes 4d6 cold damage. If a creature is adjacent to more than one frost corpse, it takes the damage once, but the damage is increased by 2d6 for each additional frost corpse beyond the first.
  • Path of Frost When a frost corpse moves, the spaces it travels through become difficult terrain for 2 rounds as hoary ice builds up in its wake.


  • Multiattack. The frost corpse makes two slam attacks. If both attacks hit the same target, then the target must succeed on a Str save (DC 16) or become restrained as ice forms around the target, immobilizing it. Breaking free of the ice requires an action and a Strength/Athletics check (DC 14). The ice can also be broken by dealing 15 points of damage to it, or any amount of fire damage.
  • Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 1d6+5 bludgeoning damage plus 4d6 cold damage.


These corpses are covered in hoary frost and snow, but the suddenness of their movements and faint blue glow of their eyes are clear indicators of the unnatural.

Most frost corpses are content to lie dormant until intruders disturb them, but a few have built primitive altars to the nearby polar eidolon, and a rare few travel short distances away from the eidolon to run errands and perform simple tasks for it. They behave like zombies when awakened, but the frost corpses have at least a modicum of intelligence and can speak-though they use their voices only when speaking as the polar eidolon (see below). If the PCs encounter frost corpses, then a polar eidolon is near, and the frost corpses’ battle tactics involve moving the PCs closer to the eidolon or keeping the PCs close once the eidolon reveals itself. Because they’re a much lower-level monster than the eidolon itself, use them in large numbers to help the eidolon control the battlefield.

Because decomposition slows to a crawl in polar climates, many of the frost corpses are centuries or even millennia old. The eidolon cares little for wealth or the trappings of civilization, so frost corpses often have possessions (including maps and magic items) from bygone ages.

Section 15: Copyright Notice

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

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