Painted walls and a shadowy figure ... how can these insubstantial elements open that all-too-solid door?  A locked-room puzzle with multiple solutions!

A local Wizard, rumored to have lost his mind, like he has his hand, Has issued a Challenge and a prize for all. Simple-Enter his tower and find him to claim your prize.

Quest

Maranesh, God of Magic, wearied of the multitudes of humans who came to him, clamouring to be taught the secrets of magic. So it was that he devised a test that would separate the worthy from the unworthy.

You have all chosen to follow the Path of the Philosopher. Not for you the warrior Path of the Battlemage, fighter for justice, nor the Path of the Healer, worthy though it may be to heal the sick. Equally you have rejected the Path of the Artificer, the tinkerers, who work on devices and techniques, as well as the Path of the Loremaster, who merely delves and catalogues the knowledge of the past. No, you have decided upon the Path of the Philosopher, the highest calling, the way of true enquiry, where you will probe the realms of higher mathematics, ponder the meaning of truth itself and tease out the deepest secrets of nature and the workings of the world.

A Magical Puzzle Key for opening a door. Innocuous, somewhat simple, but fun to solve, if you like puzzles.

A magical barrier of acid blocks your path. Solve the puzzle to unlock the door.

A combination lock, possibly to open a chest or door or other entry point. A magical puzzle, for those interested.

Checkerboards on floors of dungeons… is there any greater bane to adventurers?

If the adventurers are smart, they can solve this riddle and get the information they need.

Then suddenly all your body paralizes and you hear a voice echoing in the distance "seems like another rat has been lured to my maze," this voice was terribly cold but playfull, "come on you are not already planning on leaving, the fun has only begun."