In Kharg's story: Rivalry, once you have obtained the Lamda sutra, and have had it read, return to the library and open the special door again. A Diekbeck imposter will be on the stand where the Lamda sutra was. Talk to him and say he is lying when he says he leader of the Ultra-Mech Squad. Then he will ask ten questions, the following answers are correct.

1. Counterclockwise.
2. A cat.
3. Beautiful stones.
4. Palkia.
5. The entrants' lunches.
6. Dice.
7. The shinobi gang.
8. Lakelta.
9. A pipe.
10. Buster.

You will be awarded a Spirit Amulet which blocks all elemental attacks except for dark attacks.