We last saw Isabel Maru aka Dr. Poison fleeing from the battle between Diana and Ares in WW1. While spared by Wonder Woman, the wicked doctor resents her pity and after she disappears, decides to continue her experiments on the human body.
Ares had whispered the inspiration for her previous devices and weapons of war, but in the end had revealed far too much, as Maru soon realized that she now also understood something of the Amazons' powers.
Mask destroyed, she strove to heal the large scar on her face and nose. Melding her science with the magic of Themyscira, she injects a new serum into her small body and undergoes an awesome transformation.
Not only does her face heal, leaving but light marking behind, her whole body grows and changes, turning her into a super strong Amazon, with Dr. Poison truly becoming one of Diana's greatest enemy. A Wunderfrau of her own making.