Before I forget: after Colossus 8 there is a short video showing the girl I'm trying to bring back to life sitting up as if she's alive again. This is probably a dream. The video format is odd: it looks like an old movie or TV tape with skips and scratches.
Colossus 9 is the only one that's killed me three times. How are you supposed to dodge his lasers? Figuring out the trick wasn't hard, as soon as I ran away for a bit and noticed the "special" features of the land. This is one of the few times I've used the light from the sword to find the weak points.
Once you put all the pieces together for this guy, it's awfully logical.