In the Sky Island prison.
Gecko Moria, the Invisible Man Absalom, the Burning Man Acchino, the Leopard Man Rob Lucci, the Wolf Man Jabura, the Door-Door Man Blueno, the Pierce-Pierce Man Kibokun, the Spring-Spring Man Bellamy, the Dissolving Man Buck...
Not only had these prisoners had their hearts removed by Trafalgar Law, but they were also being used by Bonney as practice subjects for her Age-Age Fruit ability.
Worst of all, they were having their blood drawn for research by scientists like Vegapunk. The Zoan Devil Fruit Users had their blood extracted, their Lineage Factors harvested to create perfect artificial Zoan Devil Fruits.
The Paramecia Devil Fruit Users also had their blood drawn, their Lineage Factors extracted to produce artificial Paramecia Green Blood, serving as a strategic reserve of Paramecia abilities for this batch or the next batch of Seraphim.
Aside from making Elemental Devil Fruit weapons and artificial Zoan Devil Fruits, the Gas-Gas Man Caesar was beaten up by Huanglong every day. He was also dragged off to serve as a Logia-type sparring partner so everyone could practice Armament Haki, leaving him black-and-blue every day.
Only the Munch-Munch Man Wapol and the Slow-Slow Man Foxy were having a relatively comfortable time. Wapol now worked seven hours a day, devouring all kinds of materials to produce various alloys, including Shape Memory Metal.
Foxy, meanwhile, had temporarily been requisitioned by Doctor Vegapunk as an experimental assistant.
Under the Slow-Slow Fruit's thirty-second effect, they could stack more experimental procedures together, reducing the failure rate or performing even more incredible operations.
The Paramecia abilities of these two had also entered the strategic reserve of Paramecia Green Blood.
If this Paramecia Green Blood could work on anyone other than Seraphim with Lunarian Tribe blood and extraordinary adaptability, Vegapunk would have wanted several of his