Invisibility Cloak

Which of the four Hogwarts houses is known for its bravery and courage?

What is the core of a wizard's wand made from?

What magical tool is used to cast spells in the Harry Potter universe?

What magical creature can change its appearance at will?

What object holds the key to the secrets of the Hogwarts houses, yet its true nature remains a mystery even to the wisest witches and wizards?

These magical corridors can transport you to distant parts of the castle, but to find them, you must look beyond what is seen and venture where few dare to tread. What are they?