Inside the racetrack, Black Billy, carrying Freya, was like a black bolt of lightning, its speed far surpassing everyone's imagination. Even experienced jockeys were astonished at Black Billy's velocity.
What amazed them was the speed, but what surprised Marvin was the potential Black Billy had yet to unleash.
It is well known that Mercury's Blood can block the connection between a Supernatural Being's power and its body, acting as an inhibitor, forcibly making a supernatural creature ordinary. And yet, Black Billy, having consumed Mercury's Blood...
Could still burst forth with such astonishing speed?
This was somewhat similar to the Phosphorescent Horse listed in the Bestiary, under the odd-toed ungulate horse category. The Phosphorescent Horse is a type that ignites on its own, not from its body, but from the sweat it secretes when running, which is a flammable substance. When it burns, it emits a black-red light, which from afar, resembles the bright light of a lighthouse.