So, recently I was trying to find a sound effect that I vaguely remember and can't clearly describe.
It sounds like little pieces of wood hitting each other and i think it's some kind of traditional asian instrument. You might have heard it in anime when chapter ends on a serious note or on an intriguing moment.

It's emotionally neutral sound, or even a serious one, which is used in moments of tension. I think I heard it in Evangelion but I'm not sure