New Super Luigi U: Frosted Glacier- Fort -- Icicle Tower

As the name suggests, there are icicles in this fort that will rain down on you when you approach. Some will remain on the ceiling and act like spikes. Go past the Bony Beetles and icicles and take the elevator up. For the first Star Coin, when on the elevator, run to the right. At the end of the elevator ride are several floors. There are spikes and icicles here. The second Star Coin is on the left side. Jump slightly to get it without going to the level it's on so you won't be damaged by icicles. Climb up and you'll see another elevator. When on the elevator, run to the left to get the third Star Coin. Use the pipe cannon to reach it and the boss door. Kamek powers up Boom Boom so he can jump higher. Stomp him three times to win.