C102 Phantom

The Phantom did not really have a fierce Phantom, but a poison concocted by a few poison masters.

Because this poison was colourless, tasteless, and not easily detected, when it was activated, it would leave a faint black mark on the victim's limbs and neck, as if a Soul Confiner had used a rope to "strangle" it. This was why ancient poison experts called it the "Phantom".

Arsenic