Poll #380: Frostlands: Arctic/Aquatic Monster (Patreon)

When laying out my adventures for the month, I realized no aquatic ice monster was on the list. What sort of Viking adventures would these be without at least one aquatic encounter?

Below, I've picked out some arctic/aquatic monsters from the 5e monster manual as well as Kobold Press' books. Pick the one you like best. The top pick gets an adventure made for it.

Akhluts—Part killer whale and part wolf (CR 6).

Birgemon Seal—Seal creatures whose backs open up like the Thing. Pretty gnarly (CR 2).

Glacial Crawler—Like a big, pink tapeworm that lives in deep, cold waters (CR 11).

Hag, Floe—Floe hags are found in freezing cold seas (CR 5).

Hvalfiskr—Part giant, part whale (CR 15).

Iceworm—Tube-like warms drawn to warmth (CR 1).

Imperator—Huge penguin monster that travels with swarms of penguins (CR 11).

Krake-Spawn—Part spider, part squid, part demon. Super gross. (CR 9).

Lindwurm—Crocodiles with long bodies that live in cold waters (CR 5).

Pal-Rai-Yuk—Strange, three-segmented dragon things with dorsal fins and six legs (CR 8)

Ravenfolk—Avian race of scoundrels and schemers cursed by Odin (CR varies)

Runeswarm—Runes that have gained sentience and now attack things (CR 10).

Shimmer Seal—Nearly transparent tusked seals (CR 5).

Vikings—Other Vikings, that is, that aren't you. Will make new stat blocks for them. (CR varies).