Encountered Mystical Artifacts

Sometimes you encounter things that you don't get to keep. Whether they disappear in a cloud of smoke, turn into a demon/teacher/friend, or you simply put it down just there, literally right there, for only a second and now it's gone, you have to keep note of them in case they turn up again later and cause bad things to happen. Here's a list:

Obsidian Serpent

Mrs. Jenkins

Encountered Mystical Artifacts

You Can't Stay Seventeen Forever Morgothra