Anime Crossover: A Roundup of Life-or-Death Battles Against Stronger Opponents!

[Since ancient times, the strong have made their names known throughout history and ruled supreme for millennia. Yet no one ever notices those lying low in the shadows, or the resolve born amid the ruins!] [Faced with an unbeatable enemy, the weak have only one choice: stake their lives!] [Even if you can't win, you can still land a devastating blow!] [Risk your life! A look at five desperate challenges against stronger opponents!]