Fire Emblem 0 (Cipher): Warblade of Heroes (英雄たちの戦刃 Eiyū-tachi no Ikusa Yaiba lit. Battle Blade of Heroes) is the first booster series released for the trading card game Fire Emblem 0 (Cipher). It was released by Nintendo alongside Fire Emblem Fates, Fire Emblem 0 (Cipher): War of Darkness, and Fire Emblem 0 (Cipher): Awakening. on June 25, 2015 in Japan.