It's an Summoned beast like Esper.
Interestingly, it shares many similarities with the Wear Dragon from Altered beast.
Recommended CFG scale: 2–3
It’s not quite as effective as that, but the output in draft mode is actually quite useful.
Include these prompts at a minimum :
dragon, red eyes, green skin, tail, claws, spikes, horns, open mouth, fangs, dragon wings, wings,