Some time ago I came up with the Nc6-b8 idea, after I read some article about the surprising Nc6-a5 (played by some strong otb players) in the Bb5 line in the Sicilian defense.
The idea of Nb8 is to avoid doubled pawns and to gain tempo with a7a6 questioning the Bb5.
The move Nb8 is possible because, unlike in the Ruy Lopez, there's no pawn on e5 "semi" hanging, after Bb5.
It is not an idea that I would play right away in otb team matches, but for fast time controls it might surprise your opponent.
As you can see in this game, it transposed to normal Sicilian defense after a little while.
en.lichess.org/Hs3MgjXv/black#6
The idea of Nb8 is to avoid doubled pawns and to gain tempo with a7a6 questioning the Bb5.
The move Nb8 is possible because, unlike in the Ruy Lopez, there's no pawn on e5 "semi" hanging, after Bb5.
It is not an idea that I would play right away in otb team matches, but for fast time controls it might surprise your opponent.
As you can see in this game, it transposed to normal Sicilian defense after a little while.
en.lichess.org/Hs3MgjXv/black#6