Cave of the Word Wizard

You have wandered into a mysterious cave, and the entrance has been sealed behind you. Suddenly the Word Wizard appears and informs you that in order to leave his cave you must find four magic crystals which have the power needed to open the cave entrance. You have only a flashlight to help you find your way, and your batteries are running low. The Wizard is a funny old fellow who causes lots of mischief for anyone who enters his cave. He will appear often and ask you to spell a word - you will actually hear the old Wizard's voice - and you cannot continue your search until you spell the word correctly, but each time you are wrong, he will draw energy from your light. When your flashlight runs out of energy, you will be doomed to roam through the cave in darkness forever.