From dripping water I am made, then hang like winter’s crystal blade.

You can cast it Beyond a doubt Or be a remnant of your former self Keep your face to the sunshine and you can avoid seeing it

This could be a tool, a weapon, or a place that corvids get drunk

I trap a rainbow deep in stone, October calls me as its own. Born of earth yet lit like flame, no two behold me quite the same.

Calm or not, this riddle is a rat, stuck in one.