Frostmere Reach is a frost biome that runs up to Threat 25, and everything in it is Frost — so Chill and the Freeze payoff are the language of the fight. Frost Wyrm waits at the end, with 1050 health and 8 Uniques to give up.

A run through it lays out 28 rooms — 1 entry, 17 combat, 2 boss, 2 transit, 1 shrine, 3 branch, 1 loop and 1 placeholder — and draws 0–10 of the combat ones on any given floor. Come in around level 4.17 for every Threat step you are attempting, with about 12 power for each of your levels.

2 creatures from the shared Demon crowd are swapped out here: Imp → Frost Whelp and Imp Overlord → Frost Wyrm.