Here is the 12 crossing knot, re: SVG post, slightly modified. A knot that preserves the crossings, etc, is topologically equivalent. Used the amplitude blend method.
Pipe2 used also.

A crude attempt at 3 dragon pendant, with a knot modification. Pipe2, Taper from about 4 at head, to 0.5 at tail. Blendcap, G3, Head Bulge about 4, Tail Bulge about 5.

Note that Blendcap slider appears as the Blend slider, since Blendcap uses Blend. (Used a Bulge slider mod.)
Note that the Bulge number is not restricted to the slider range. The Bulge number can be manually entered, and can be out of the slider range.

Have yet to make mouth, teeth, ears, eyes, nose, fins/wings, etc.

The heads could start at different points of the knot. The tail end was just roughtly point dragged in Top view.

- Brian