Demon Gate is an abyss biome that runs up to Threat 20, and what lives in it carries no affinity of its own. Imp Overlord waits at the end, with 960 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 5 for every Threat step you are attempting, with about 10 power for each of your levels.

It uses the shared Demon Gate crowd unchanged.