3 questions:

First 'Knight' completion gives you the oldest black knight retro mode? This is 'easier' as you already have some letters lit.
What would a second 'Knight' completion give you? The BK2000 song/mode?

What is needed to qualify for the black castle wizard mode?

I could not find a certain strategy setup in the game.
Except for the 6 ball multiball combined on the premium/le. But is it worth more then? Or would it be smarter to avoid playing them together?
Next to that you have the logic thing to start a mode before starting multiball (but it's the same shot so not that hard).
Is there another strategy, multipliers, super modes or is this game quite 'classic' regarding rules?

I think first knight completion is retro black knight (easier cause already free letters spotted)
I think second knight completion is retro black knight 2000 mode... "aaaaa aaaaaa aaaaaaa...."

But what would you need for the black castle wizard mode (it's on the instruction card)? That I'm most curious about.