Elemental, Permafrost 2014
CR 6 elemental
Large elemental, neutral
Can burrow through nonmagical unworked earth/stone with o disturbing material it moves through.
Doesn’t require air food drink or sleep.
The ground within 10 ft. of the permafrost elemental freezes over and is difficult terrain.
If it takes 15+ fire on single turn each creature within 10 ft. of it: infected with primordial plague disease (DC 14 Con negates). Alternatively creature becomes infected with sewer plague or cackle fever (elemental’s choice) instead. Primordial plague takes 1 min to manifest in infected creature. After 1 min creature poisoned until disease cured. Every 24 hrs that elapse creature must re-save reducing its hp max by 5 (1d10) on failure. Disease is cured on success. Reduction lasts until disease is cured. Creature dies if disease reduces its hp max to 0.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details