Minecraft Dungeons:Soul Sand Valley

The Soul Sand Valley is a secret level $$, in the Flames of the Nether DLC. It is unlocked through a secret that can generate in the Crimson Forest, which in turn can be unlocked from a secret in the Warped Forest.

Trivia

 * It is currently the only level that is unlocked inside another secret level.
 * It is the only Flames of the Nether level that contains regular skeletons and wraiths.
 * Unlike that in the base game, the speed of players doesn't seem to reduce when players walk on soul soils or sands and they don't seem to change the orange flames made by blazes into blue soul fires.

fr:MCD:Vallée du sable des âmes zh:MCD:灵魂沙峡谷