Well, you've got your bad rain, and you've got your good rain. After a volcanic eruption, you can get some really bad rain. Maybe the VMs is the good rain? Does the idea or the mythology of the rain dragon occur during the time of VMs composition? Probably so. How should that creature appear? Who are we to say?
That looks like an illustration of the bad kind of rain.
That looks like an illustration of the bad kind of rain.