Defeat Black Doom

Duck is running after that Battle

Duck: (Panting) How come? It was mine.

?????: Know this. The heart that is strong and true shall win the sword.

Duck: Huh? Are you saying that my heart's is weaker than his?

?????: For that instant, it was. However, you can become stronger. You showed no fear in stepping through the door to darkness. It helps no terror for you. Plunge deeper into the darkness, and you heart will grow even stronger.

Duck: How can I do that?

?????: It's really quite Simple. Open yourself to the darkness. That is all. Let your heart, your being, become darkness itself.

1 hour later