The Magic Gauntlets are a special item that can be found at the top of Giant Tree. It's one of the four pieces of Armor scattered around the castle. According to the game, "The magic gauntlets provide additional gripping strength. They can be used to climb some ropes that are otherwise impossible to grasp." The slippery ropes in question look white or grey rather than yellow-orange, and are found in the Witch's Woods and South Wall 2. Without the Gauntlets, it's as if the ropes aren't there. With the Gauntlets, you have to keep climbing up, or you will slip down and fall.