The range of a musical instrument refers to the span of pitches between the highest and lowest notes it can attain. It is an instrument's upper and lower limits.
In a casting, the Range Card refers to limits in capacity, resources, or ability; its appearance indicates we've bumped up against some sort of edge, some boundary. That boundary may be real, in which case we know what we have to work with; or it may be imagined or assumed, in which case it might be holding us back unneccesarily, or falsely coloring our view.
To divine the meaning of this card in a casting, consider the Solfege Die it was drawn above or under.
Click here to learn more about the Compositional Cards as a whole.