Stones of Light
Nie Li states that the origin barrier surrounding the Ten Millennium Spatial Array uses 23 Stones of Light as the activation core. Then after entering the Abyss Prison Realm, he also finds a teleportation array that requires 23 stones of light. In order to leave this dark space they will have to find enough stones of light to activate it.
When he comes across the Silver Winged Family he tricks them into gathering the stones for him. However, they are not so naive as to just hand them over to Nie Li. The stones are carried by Sikong Jue in an Interspatial Ring.