He shall hold a blade of light in his hands, and the three shall be one.
"blade of light" = Callandor?
"three shall become one" = Three "sources" (Saidin, Saidan, the "true" source)? Rand + the two women he's linked with to weild Callandor? Rand, Lewis Therrin, and Ishamael? Rand, Perrin, and Matt (maybe the colours they see combine them when they meet)?
