User blog comment:IamJakuhoRaikoben/Chapter 280: Kagura vs. Yukino, Review./@comment-4999650-20120420203140/@comment-4835230-20120420203859

Ophiuchus is the 13th Zodiac reintroduced sometime in 1990. It's a more popular zodiac in Japan than in most other areas, though. And I agree that he did throw in the final 3 Zodiacs out there pretty quickly o.o;