Three-Headed Snake Block, or Meringue Clouds-6, is the sixth level of Meringue Clouds in New Super Luigi U. It is unlocked by completing Vanishing Ghost House and its own completion unlocks Ludwig's Block-Press Castle.
The level begins on a platform a cloudy area, with a Snake Block block above a pit. As the Snake Blocks travels, it splits into a set of three Snake Blocks, and Foos can be found. The Snake Blocks continue traveling to the right, occasionally overlapping with each other, as well as coming together and splitting. A set of Goombrats appears on lifts, along with a Foo. A Red Ring is found, along with more Goombrat on platforms. More Foos are found, followed by another section of Goombrats on lifts. The Goal Pole is then found.
- Star Coin 1: The first Star Coin is floating above the path of the bottom Snake Block formation.
- Star Coin 2: The second Star Coin can be seen hidden behind a cloud.
- Star Coin 3: The third Star Coin sits in the open, and the player can glide into it to collect it.
- At the beginning of the level, Luigi must Spin Jump to reveal an 8-bit Luigi.