Fairy Tail season 6 episode 37
Episode title: Tartaros Chapter - Soaring Above Ishgar
Gray survives Mard Geer's ultimate Curse, revealing that his recent changes have left him not altogether human. Erza defeats Kyoka, but the demon has the last laugh as Face is activated. Almost immediately, the Fairy Tail members are sapped of strength as the Face units begin to siphon magic from all over the continent.
