Me: doodly doo, checkin on a D&D thingβ
This may give a whole new meaning to Silver Void (what Argentum Inanis translates to).
In Dungeons and Dragons, the "Silver Void" is another name for the Astral Plane, a place described as "the space between everything, the road that goes everywhere, and where you are when you aren't anywhere else". It's an extradimensional space usually only reached by performing what's known as "astral projection".
Astral projection is where you leave your body to go explore this "Silver Void". Meaning, you can still be killed in either formβ if your body is slain, then your spirit follows soon after; and if your astral self is slain, you return to your body in a coma.
This could imply two things:
1: If Character!Jack's spirit was killed while he was "astral projecting" (Mayhem 2018 maybe?) it'd leave his body in a coma state. And if he was actually astral projecting, it'd leave his empty body open to possession in the meantime.
And 2: If Marvin is trying to explore this astral plane of existence in search of something, his body, too, would be left open to potential possession. Hence why he'd need to "use it with extreme caution".
What this means for Marv's orb, I'm not sure. It could've shown him visions of the past or future, or he could've been having an astral-projection out-of-body experience when he touched it. Maybe both.
β¦ I do like this potential definition though. Lots to be explored here.