This extreme aversion to heat, as well as its freezing touch and devastating breath weapon, stems from an unusual facet of frost worm physiology-veins that run with magically cold blood. This creature's ichor is clear, but infused with such sub-freezing temperatures that the monster's flesh can freeze water in the skin of creatures that touch it. When a frost worm dies, this magical energy dissipates, and both blood and muscle immediately freeze solid and then explode into a catastrophic barrage of icy shrapnel. As a result, even those predators that might legitimately prey upon the burrowing monstrosities tend to leave frost worms well enough alone.