Yu-Gi-Oh! Zexal Vol. 6 (manga)

Kaito and Shark find themselves in an epic duel with Shadow. The fallout from this battle leads to some surprising revelations about the Numbers War: Yuma’s friend Astral originally came to destroy the world and Dr. Faker is actually dead! They’ll have to take their battle straight to Mr. Heartland to get to the bottom of his evil schemes!