Infinite Dendrogram Manga Omnibus Volume 4 contains volumes 7-8 and features story by Sakon Kaidou with art by Kami Imai.

The City of Duels is Heating Up!

A challenger from Huang He comes to duel Figaro, the local legend. As luck would have it, Ray just so happens to have a front-row seat! Both of these Masters wield powerful Superior Embryos and have no intention of losing. Who will be left standing at the end of this ferocious encounter?

As the duel comes to a close, a shadow looms over the city of Gideon. Mr. Franklin, the Giga Professor from the Dryfe Imperium, makes his terrifying debut! The sadistic scientist sets his sights on throwing the city into utter chaos. Unfortunately for him, Ray, Marie, and Rook aren’t about to go down without a fight! Outmatched, outnumbered, and outsmarted, the knights and Masters of the Kingdom of Altar swiftly prepare to retaliate. Will their fighting spirit be enough to defeat this mastermind?