Illager dungeons, a prison beneath the earth

A new structure will spawn beneath the earth below y0. It will have many prison cells and illagers here as well as a new one. The new one will only spawn here and if it attacks you it traps you in one place before teleporting you to a cell. The three rooms that spawn are the storage rooms, hallways, and special cells. Hallways have villagers as prisoner and special cells have iron golems and allays. Storage rooms have chests and barrels filled with loot. But, some of these chests are trapped so beware!