Legacy of Kain Soul Reaver Gameplay part 2 (Necropolis and Melchiah battle)

After discovering that your clan (raziel's clan) has been literally destroyed, you think it was Melchiah's hand. Then you go searching for him and end up in the (place named) Necropolis. There are a bit of puzzles (Boxes...) but not a lot. Then at a time you shift back in spectral realm...only to discover a soul-sucking soul...of a dead vampire (or someone else). Then you defeat it and continue through other puzzles. Then you go in a big round place where Melchiah is there.... Than you fight against him, hitting him with gates (with a switch) in his head. then he ends being killed by a big smasher-round grinder and then you take his soul enabling you to pass through gates (in spectral realm only).