Tethering a soul to a body was something Kai already knew. But Orlin had far more to teach.
"Souls can be bound to more than flesh," Orlin explained, placing a rusted dagger in Kai's hands. "Try this."
Kai frowned. "A weapon? Why?"
"Anything without a soul can hold one, provided it is strong enough. This can be weapons, armour, even children's toys."
Orlin reached into his robes and withdrew a small glass jar. Inside, something churned.
A wisp of spectral energy, pulsing with faint light.
The soul within scratched at the glass, desperate, clawing at the container's walls with unseen fingers.
"This," Orlin said, shaking the jar slightly, "is your subject. Bind it to the dagger."
Kai hesitated before taking the jar, the cold glass pressing against his palm. The soul within twisted violently, sensing its fate. He glanced at Orlin, who merely gestured for him to proceed.