In this episode, the protagonist battles Cassios in Greece to earn the Pegasus Cloth , marking the beginning of his journey as a Saint [1]. If you're looking for more info, I can find: Where to stream the series A summary of the plot for this episode or the season The manga chapters that correspond to this episode
That phrase is the title of the of the anime series Saint Seiya (known as Knights of the Zodiac in some regions) [1]. 1 : He Who Would Challenge the Sun