Night’s Black Agents: Tribes of Tokyo episode 12

The Ronin have found the secret hideout of Sheng's cult and have called in the authorities for a final assault on the notorious terrorist group 'Empty Five'. Despite the attack helicopters and platoons of heavily armed soldiers on their side, the Ronin know that victory or death will come in their own skills and preparation. They know they have the right weapons and as much knowledge as they can bear, but Sheng always seems to have a secret or two up his sleeve. Then there's the matter of an Iron-Banded Box....