DIO's Bone

The term Dio's Bone (DIOの骨 DIO no Hone) refers to a finger bone belonging to Dio, entrusted to Enrico Pucci before the events of Part VI: Stone Ocean.

Summary
After Pucci enlists Sports Max's power to bring it back to life, the bone becomes infectious. Anyone who touched it would mutate, slowly germinating, until becoming a sort of plant.

Once plants, the nutrients they absorb from sunlight were given to a baby-like creature referred to as Dio's homunculus, or the Green Baby. Upon the birth of the Green Baby, a part of Dio's soul was reborn into it.

This part of Dio then sought out Pucci, and upon finding him fused with his Stand in order to create C-Moon; as a fusion of Dio's Stand The World and Pucci's Whitesnake.

This Stand seems largely to have been a placeholder for a final step, as Dio slowly assumed Pucci's mind and they became one. Due to C-Moon, gravity coordinated with Pucci, finally granting him Made in Heaven; able to accelerate time.

In this final form Pucci demonstrates several of Dio's tactics, such as using his control over time to launch an attack of speeding knives at the heroes.