Fairy Tail (2014) Ep. 59: "Tartaros Chapter, Prologue: The Nine Demon Gates"

There are two ways to interpret "Episode 59" because the 2014 series (Season 2) often restarted its numbering or continued from the original show's count.

Fans generally love this episode for its "Jerza" (Jellal x Erza) development and for raising the emotional stakes of the Nirvana battle.