Fan Casting Shadow Monster in Blood-C: Demonic Moonlight

A shapeless creature that takes any form and kills anything stand in its way. The creature is known for killing townspeople on broad daylight. It inhabits a box and will grab it's prey into the box so that it could feed on its victims. The monster can also possess a human under it's control and can also create multiple copies of itself. It is responsible for causing several children to go missing.