Hour of the Ox
In this chapter, Samurai X must fight wave after wave of fanatical zealots, loyal to the cult's cause. The interior of the temple can hold as many monks/cultists as you would like, but beyond 30 and this is going to get very silly. The hallways are wide enough for 2-4 cultists, coming wave after wave.
The PC should actually get tired of the fighting.
As for the temple itself… since this temple was built for another purpose, feel free adorn the interior however you like, and desecrate the walls with unholy words, strange markings, and blood.
Fighting. Lots and lots of fighting.