The way to kill an Enma.

Only through a judgment can the King be killed.

To receive a judgment, sin is necessary.

The Enma determines sin, but... he will need the Rod of Remorse to do so.

The great stone which is the material of the rod-

is deposited at the court under the king Enma, you said?

I see, it is a simple matter then.

We shall rob that, judge the King and we are done. The villainous Enma goes straight into the Avici hell. The Avici hell, the lowest level of Naraka/hell realm. The eighth and most painful of the eight hells in Buddhism. Also called "hell of no return."