For everyone whining about how this needs to be in Valguero, it was originally the case. That’s why they added the irradiated/luminous area into The Emerald Forest, as they were planning on adding the rock drakes and their nests into it. While I do know that, I’m not sure why they discarded actually adding the rock drakes... more than likely a time constraint or because ‘drakes didn’t fit Valguero’s map.
How to grow one without nameless venom: you use snow owl. Every time the rock drake gets low, just heal it with the snow owl. And if the torpor because of starvation gets too high, then feed it stimulants. 👍 good luck with your drake