Snowdrift Station

Enter Snowdrift Station and read the first stone tablet. You'll need to find the correct order for the five switches to the north.

Take the southwest staircase. Step on the ground switch to open a door. Quickly navigate the icy river, rolling on turns, and pass through the door before it closes.

Read the stone tablet: "The first and the last are on the ends."

Take the stairs, go south, and exit the room.

Take the northwest staircase. Navigate the block-pushing puzzle: push the block north, east, south, west, south, east, north, then east to place it in the water.

Hop on the block and use the Whirlwind to move east. Kill the Octives with Arrows and block incoming arrows from directors with your shield.

Read the stone tablet: "The second one and fourth one are next to each other."

Head up the stairs, take the passage west, and exit the room.

Take the northeast staircase. In the dark room, head west to an unlit torch in the water. Light it, then create a sheet of ice on the water to move west. Continue lighting torches and creating ice sheets to cross the water.

Read the stone tablet: "Don't hit the false one in the middle."

Take the stairs up, go east and south back to the exit.

Take the southeastern staircase. Head east, then north. You'll be locked in a room with icy torches, Ice Keese, and Octives. Defeat them.

Read the final stone tablet: "The second switch from the left is the third switch to hit."

Backtrack to the main room with the switches.

Using the clues: "The first and the last are on the ends," "The second one and fourth one are next to each other," and "The second switch from the left is the third switch to hit," determine the correct order. The order to hit the switches from left to right is 1, 4, 2, 5.

Trace a path with the Boomerang to hit the switches in the order: 1, 4, 2, 5. A bridge will appear.

Head north and defeat the Freezards. Use Light Arrows if you have enough ammo, otherwise slash them and take cover when they attack.

Open the chest to receive the Alchemy Stone.

Return to your train and travel to the newly opened dead-end track.