Ethereal Filcher

Thief! THIEEEEEEEF!

 

Ethereal Filchers like shiny things, especially if they are held by heroic adventurers. And they can also teleport in and out of the etereal plane.

 

So yes, the ONLY reason for these guys to exist is to rob the players blind and then disappear into the aether, never to be seen again. They're almost as awful as rust monsters in their own way.

Done