The "Pain Bat" can only be activated after absorbing sufficient damage.
Anna summoned the bloodline hidden deep within her, transforming into a giant ancient bat. Under the incredulous gazes of everyone, a bat over three meters tall, bipedal and winged, appeared on the screen. [Bat Anna] had arms thicker than buckets and thighs like massive pillars.
Her round shield melted into a pool of blood, only to recombine in a flash of light, transforming into a two-meter-long, double-edged great axe covered in bloody veins. If the long-dead Sloane were to see Anna’s massive axe, he would likely be frightened out of his wits; the two sides were simply not on the same level.
Chapter 326