A small tree that has wrapped itself around a small rock that has a blackened appearance. Small rivers of metallic red liquid trickle down the sides of the rock as the roots continue to dig into it.
It smells faintly like a Wound.
The rock is tainted, as if from a Wound. The tree is not tainted, and seems to be taking on the dual roles of predator/scavenger. Consuming the tainted Resonance of the rock transmuting it into sheer pain. Pure unaltered pain that scours the objects around it of sins.
The plant was likely placed inside the box to cause pain to the spirit trapped inside.
The rock was taken from "Where the discarded things are grown."