Lego Lord of the Rings -
After reaching the top of the tower, the final battle with the demon will begin. The task is easy: you need to avoid Balrog's attacks (you can jump above both the whip and sword attacks) waiting for lightning to hit. When the storm starts, stand in the shining circle, press (K) and aim the electricity beam at one of the bricks on the demon's wings. The whole cycle has to be repeated two more times - you need to hit the second wing and afterwards the body. This will be the last time you see Balrog during your adventure.