Right before his meeting with Luna, Noir goes to visit Olivia. He asks her if there's a more effective way to gain LP and she tells him about a forbidden skill that will make him very lucky in the most unexpected way.
The Hidden Dungeon Only I Can Enter.
الدّيماس الخفيّ الذي لا يستطيع دخوله سواي
La mazmorra oculta
a la que solo yo puedo entrar.
The Hidden Dungeon Only I Can Enter.
A Masmorra Oculta em que
Só Eu Posso Entrar.
Сильнейший герой,
обученный в тайном подземелье.