Kamaitachi

S1 E3: Once a year, Kogan awakes from his death-like slumber to oversee his dojo. Locked in a decaying state, the master demands to know which of his samurai is worthy of the Kogan legacy. Seigen and Gennosuke are the most likely candidates, but no one is sure which swordsman is best suited to give their demented leader what he desires. In the end, Kogan himself devises a devious challenge to clarify the situation.