This pattern is Mandala. It was last year's Goddess Knits Anniversary Mystery Knit-a-long. The Ravelry pattern main page has some pretty pictures of finished shawls.
This pattern had 5 clues. Each of the first four clues had four different charts to choose from. So many options for the final shawl. The last clue was the edge. There was only one choice for the edge but you could substitute with another edge that had the same number of row repeats or if you were willing to do the math. I went with the given chart for clue 5.
I was nervous about the blocking but it was a snap with a 70" round plastic table cloth.
Oh...here's my project page at Ravelry.