It would be a solid enough explanation if he weren't pretty sure that the astral side this guy is talking about is different than the astral plane he got to be familiar with on Faerun. "It looks like a Greek mythology monster that got here via the Event Horizon. I think it's barely connected to itself, let alone anything else." Though if this guy decides to give the blob a full autopsy, he's leaving.

"Couple of bruises, maybe. Nothing big."

From further back in the field, Athena meows loudly. Hey! She found your gun!