Defeat the Warlock Lord and Belezar
To defeat Belezar, put the dragon eye on the fake Staff Of Ages. Then, to defeat the Warlock Lord, put the Staff of Ages and the ring in the hands of the statue of Lord Jair.( Note: put the Staff of Ages on the statue FIRST and always wear the Ring of the Kingdom when handling the Staff of Ages.) After that, you will have beaten the game!
Inner Chamber Tip
When you gain access to the Inner Chamber (Tower #2), take all three rings, red, blue, and green. When you get to the 4th trial, (maze that mixes up the controls), equip the blue ring and your controls will return to normal and you can proceed through the maze like you were playing an ordinary area. Once you step through the door at the end, remove the blue ring.