If Kolossal Killer is an effect you carry around with you, this manuscript will provide a good number of new ideas and methods for you to play around with.

Some of the content here will give you something to think about, however many of these "enhancements" are relying on equivoque to limit options. I always felt the original effect was so good because it was so clean. It didn't rely on any forcing whatsoever. Once you start making changes to that, even if done well and subtly, I believe you're weakening the effect.

That said, this is still a pretty good read, because it compiles content from quite a few different workers, and it's instructive to see from which direction each comes from in their efforts to improve and streamline the effect. You may not love all the ideas, but I enjoyed the insight into the creative process.

This expands on the original Kolossal Killer trick and takes it to a whole new level. The best part is the idea that instead of pulling the card out of your wallet, you just tell them the card before they've told you. It won't always work but your chances are way higher than just 1/52. The first person I tried it on was my sister and I got it bang on. There is also some other good stuff in there too but that is my favourite one.