S1·E9 Strong Enemy! The Four Dark Saint Kings Appear

Seiya is searching for Ikki with the aid of a police dog. Shun is in the forest remembering of the past and wondering what had made his brother change, when a new enemy arrives: one of the black saints, Black Swan. He attacks Shun, but Hyoga arrives and challenges him to a freezing duel: Swan vs. Black Swan. The other three black saints (Black Pegasus, Black Dragon and Black Andromeda) eventually show up too.