I'm Standing on a Million Lives volume 13

It's the wizened sage Ozu (actually a Dragon Bishop) against Fatina, the beautiful and mysterious sorceress! But as Round 2 of this epic battle between high-powered magicians kicks off, Futashige is still having trouble cornering the corrupt oligarch Basma. It's down to the wire in round 7, with just a day and change left to go...but a stroke of luck brings Yotsuya back to life! Now it's into the belly of the gigantic beast in search of a breakthrough!