My strategy: Keep shooting it's head with normal arrows. When it steps under the stalactites, shoot them so they hit his head. When you have enough mana, use the Fire Storm on it's head. Use the Lightning Storm on the monsters when they spawn and while the mana's regenerating, use the first and second steps. G'luck! ^_^
And yes... It was a lovely dinner... I STINKIN' LOVE THIS GAME. WHERE'S THE FREAKEN SEQUEL. IT'S THE ONLY GAME I HAVE ACTUALLY EVER PLAYED UNTIL THE END.
Ahhhhh!!! The thing that falls out from sky is like a Robot Fist or something. And wtf I used a small jump, I flew over an entire building and... I fell...