Sphere Effect: 50% boost to Rec, max HP, enormously boosts BB gauge each turn [25 BC], considerably reduces BB gauge required for BB [25%], hugely boosts OD gauge fill rate [100%], activates at turn's end BB gauge boost each turn effect at turn's start instead.

Sphere Description: The very source of power for Mavis Vermilion; the Fairy Heart. Being the guild's most closely guarded secret, the Fairy Heart is also referred to as Fairy Tail's "Ultimate Weapon".