Complex sentence: He urged Rand to take it, while he engaged Rand in a sword fight and was winning easily, once Rand took Callandor he then hoped to kill him and take the "sa'angreal" for himself.
Split into simpler sentences: He urged Rand to take it, while he engaged Rand in a sword fight, and he was winning easily. Once Rand took Callandor he then hoped to kill him and claim the "sa'angreal" for himself.