Why did the nine lamas who accompanied Naruto for half his life disappear?

Because in Biography, Naruto, Sasuke and Biography can't beat each other. Nine lamas have a way to defeat him, but he must sacrifice. At first Naruto thought he was going to die, so he started this mode. In this mode, Naruto's strength in all aspects has been greatly improved. Finally, he lost and Naruto fainted. In his dream, he learned that nine lamas were actually going to be sacrificed, and Naruto reluctantly said a word.

PS: At the end of this episode, bijuu all appeared.

PPS: Bo people ruled by Huiye pricked Sasuke's eyes innocently.

PPPS: Naruto can't have multiple shadows, and Chuck is not enough.