Whilst this discussion is interesting and all, solar eclipses happen only during a new moon, and lunar eclipses happen only during full moons. That might come as a surprise but think about it, consider the following setups:

These drawings (not to scale of any kind) show the setups for a new, crescent and full moon. It also shows the cone of shadow from both Earth (blue) and Moon (gray). An eclipse happens when the cone of shadow from either body reaches the other body. They are not as frequent because of alignment problems and sometimes because the cone of shadow is not long enough (we call this an annular eclipse). Equating this moon to 1999's solar eclipse is astronomically incorrect.
Now that I am talking about the moon, one thing that bugs me about Castlevania is the inconsistency with the lunar phases. In SoTN for example, Orlox quarters shows a full moon, so does the Tower of Fog, however the castle keep shows a crescent moon.
I'm still kinda of curious about the moon though, and its meaning. So far, I've put the picture in front of a mirror
ran scans thru it and got nothing out of it. Good imagination, Dark Nemesis.