Help me fill this Iron Tower with Fun!

[Meatboy]

You say the wizard was a powerful golem crafter? Why not combine golemancy with lichedom and say that instead of dying the wizard "uploaded" himself into a series of mystic crystal relays at the top of the tower which are connected to every golem/device in the tower. In essence the mage is now the tower and he is playing a game with the heroes. Doors open and close randomly, traps reset themselves etc.