I didn't put this together carelessly, but I do feel bad that a couple things were left out. They are things that have been searching for for you guys for quite a while, especially that iga Ninja sleep dart. Obviously you're not supposed to do this stuff, none of this should be taken literally, and I'm not responsible for an misuse of the information on my channel.
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https://www.youtube.com/watch?v=bGI2BbHqY4g
At the far side a chain link holds two key rings. From that we get another chain link on the other side of the two key rings finishing the hold. That link is linked, then that link is linked. Then again the fallowing link is linked. 3 in total to join one set of two key rings to another set of two key rings. The pattern repeats.
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https://www.youtube.com/watch?v=MEdgScVhMtE