This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 霛 is uncertain. It appears to be a variant or older form related to 霊, but the component relationship is not clearly established.
The top is rain 雨, and the lower part looks like a complex arrangement of lines and a bow 弓. Without a clear meaning, picture a mysterious rain ritual involving a bow, but remember its meaning is uncertain.
For レイ, imagine a ray of light shining through the rain 雨 onto the mysterious lower shape: ray -> レイ.