After lowering the copper whistle, Klein had already activated his Spirit Vision.
He saw illusory white bones being weakly thrown up from the ground as they slowly formed a gigantic figure. If the past scenes were like a fountain in a fantasy setting, then this was more like the flow from an ordinary reversed tap.
The corners of Klein's mouth moved indiscernibly as he pretended as though he hadn't noticed anything amiss.
After a few seconds, the skeleton messenger finally took form. Its nearly four meters body tore through the ceiling once again as the pitch-black flames in its eye sockets burned silently.
Klein folded the letter he had finished writing and threw it up.