Icy rain spell is (mostly?) implemented but not castable?

[NQNStudios]

In the code I'm seeing that there's a spell called icy rain that is either only partially implemented, or fully implemented but not wired into the spellcasting menu. Do we want it?

(It also drops ashes on the target square, which seems wrong, so I'm going to fix that regardless of whether we add it in.)

[NQNStudios]

Like, I can kind of imagine the icy rain scours the ground so it leaves something that looks like ashes? But does it really make sense? idk.