Minecraft Dungeons:Lower Temple

The Lower Temple is a secret mission $$. It is the lower extension of the Desert Temple. To unlock it, travel through the Desert Temple level until you reach the point with lots of water where an Enderman is usually seen. Turn left to a yellow room and go inside. There is 3 beacons that must be turned on and when all of them are on you can go get the scroll and unlock this level.

Story
The Lower Temple takes place beneath the main Desert Temple. It's an area full of skeletons, wraiths, and necromancers. There are also similar traps from the upper temple. After exploring the maze-like corridors, loot will be rewarded for solving puzzles. Once finished, a key golem is required in order to escape. Many chests can be found along the way. Two new items can be found here: the Battlestaff and the Dual Crossbows.

Trivia

 * The Lower Temple was previously a cut mission until it was confirmed as a free update by Mojang.