Light Blocks, Dark Tower

Light Blocks, Dark Tower, or Rock-Candy Mines-4, is the fourth course of Rock-Candy Mines in New Super Mario Bros. U. It is unlocked via completion of Grinding-Stone Tower or Shifting-Floor Cave, and its own completion opens the path to a blue Exclamation Mark Switch, a spot where a Bubble Baby Yoshi resides, a green Toad House, and the level Walking Piranha Plants!.

Layout
The course takes place underground, and the main gimmicks are large Glow Blocks that periodically shift between on and off. The course is also entirely vertical, and Swoopers are prominent enemies in the course.

Star Coins

 * Star Coin 1: To the right, next to a Glow Block wall.
 * Star Coin 2: In the middle of the course is a yellow Warp Pipe that leads to the area with the second Star Coin.
 * Star Coin 3: Next to the Warp Pipe that leads to the last section, above a Fire Bro.

Enemies

 * Swoopers
 * Super Piranha Plants
 * Koopa Paratroopas
 * Fire Bros.
 * Bob-ombs