"Fires of Creation"
I downloaded the "lava" version all those years ago. For me, that version *is* "Crucible". In contrast to the view of this as a world being destroyed, to me it shows new planets forming from the matter circling their sun, their crusts so thin that the lava of their mantles still peeks through. That's more in tune with the title too, I think. Earth in the "Hadean" epoch was like this; give this one a few billion years and it could be as lush as our own world.