adding a third knot to "the greatest knots of all time " ?

 The bowline and alpine butterfly are considered the greatest knots. They are reliable and can be used for many purposes. They are reasonably easy to tie. Rescue personnel pride themselves on tying the bowline with one hand. 

Here is a possible knot to fill the trilogy. If done correctly it synches up; if done wrong,  it's a death knot. 💀 An element of danger often makes something more exciting. Wouldn't you agree?

Before:

After:

Wrong fold, when ends don't overlap: