Morton's Lava-Block Castle
From the Super Mario Wiki
Morton's Lava-Block Castle, or Layer-Cake Desert-Castle is the Castle level of Layer-Cake Desert in New Super Luigi U. It is unlocked by completing Spinning Sandstones and its own completion unlocks Huckit Beach Resort and Broozers and Barrels.
The player begins the level near a moving platform with a Red Ring above it. A group of smaller moving platforms are found lowering into the lava. More moving platforms are seen, along with a group of Brick Blocks. A moving platform with a Dry Bones on it appears, followed by one contains multiple Dry Bones. More moving platforms are encountered, along with a stationary platform. Several smaller platforms are found rising out of the lava. At the end of the area, the boss door is seen on a platform. Morton serves as the castle's boss, and the fight is identical to the one in New Super Mario Bros. U.
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