Permafrost Palace is the ninth course in Super Mario and the Cursed Castles.
Stars[]
Act 1: On The Throne Room's Mantel[]
Act 2: Stalagmite Fright[]
From the starting point, head around to the right and enter the ice cave. Ahead is a large cave with a floor made of burning ice/lava, and a series of platforms made from fallen stalagtites (yes, the Act name is technically incorrect). To avoid slipping off the icey surfaces ahead, stick to longjumps where possible, and remember not to touch the control stick right as Mario's landing; if there are no inputs from the control stick, then Mario comes to a complete dead stop where he lands, without being affected by the ice physics.
You can either carefully jump across all of the platforms, or you can take the shortcut. This involves cutting across the ice/lava to the 9th stalagtite (see the screenshot to the right), by longjumping as far as possible towards it, then lava-bouncing twice to reach it. It doesn't have a lot of room for error, and it will leave Mario on two HP afterwards, but it does skip 9 out of the 13 jumps needed to reach the last stalagtite platform.
Once on the final platform, break open the box and grab the Koopa shell inside. Ride it into the dark purpley-pink tunnel ahead, which connects to the moat in front of the ice castle. Ride across the moat while taking care to avoid the mushroom stalks and the drawbridge, and enter the tunnel the moat flows through on the other side. The Star is at the end of this tunnel.