Has Anyone Else Seen This Before?

A friend of mine and I were going through a root chalice dungeons that I made (FRC Isz) and found this in the first room of Layer 2’s main area. Glyph is 9d3q3xa4 if you want to see for yourself. What I want to know is whether or not this has been seen by anyone else before, or if this is something new. Either way, I thought it was awesome!