Good Luck: Pentagonal
As I was posting 3, 6, and 8 I felt a twinge of discomfort. Was it OCD? Anal retentiveness? Whatever it was, it is surely related to completism and the collector's instinct. I wasn't going to be happy unless I filled in the blanks.
Here's the first. A pentagonal good luck knot, done with two over 2 crown knots.