Wisp of Light

Alex then proceeded to tell her what had happened. When it reached the part where Alex had burned the horn, Alice's anger flared.

"You did what!?"

"As I said, sent my fire toward the horn."

"No wonder the Naidon doesn't want to mate. Now I get it. 

Alex, you know you just killed my people's hope to stay holed up in that realm. It seems my choice was correct after all," Alice replied.

With what Alex did, it was only a matter of time before the last two Naidon went extinct.

"I don't get what you mean? How is it related?"

Alice then explained the reason. 

Naidon can freely move between the secret realm and the planet; she doesn't know how they can just do that.

This allow Naidon needs to eat outside the realm. Bring resource from outside.

Naidon can eat everything; they eat meat but only from those that become corpses. Plants, even some minerals like crystal or iron, are part of their palate.