The Lotus Sutra is the staff that helps all the Buddhas of the three existences as they set their minds on enlightenment

In the next life you should use this sword as your staff. The Lotus Sutra is the staff that helps all the Buddhas of the three existences as they set their minds on enlightenment. However, you should rely upon Nichiren as your staff and pillar. When one uses a staff, he will not fall on treacherous mountain paths or rough roads, and when led by the hand, he will never stumble. 28/12

From the Writings of Nichiren Daishonin
The Swords of Good and Evil