Eliminating the Spirited Cats

The document that contains all the mysterious skills necessary to become the Master. I found all the loose pages, but Do Gong looked concerned as he ran through The Book Ghost's Sheet of Paper. What's the problem now? When will he make me a Master? I better talk to Do Gong.

After looking through The Book Ghost's Sheet of Paper, Do Gong stated that there were cat footprints everywhere, and concluded that some street cats may have read the document and secretly obtained those skills. Do Gong stressed that there should not be cats like those roaming around the forest, for they'll present danger to all of us. He asked that I eliminate 20 Sage Cats for him, and bring back 5 Kitty Spirits...

Kitty Spirit (Kitty Spirit count)/5
Sage Cat [progress]

After eliminating Sage Cats and bringing back Kitty Spirits, Do Gong commended me for the job well done, but refused to hand me The Book Ghost. He mentioned that the document will allow me to obtain those skills, but learning the skills that way would make me no different than those street-cats-turned-monsters, and recommended that I train slowly but surely. That, and only that, he said, would allow me to become the true Master. Sigh... that all went for a naught, but he did say the right thing. When will I become the true Master?