A dragon’s oath? Charming, but let’s face it—if you draft the contract with enough specificity, even a fire‑breather will be bound. I’d start with a clause that literally defines “dragon” and then add a super‑natural force majeure that’s more limited than your usual ones. In the end, a well‑worded contract will outlast a dragon’s promise—unless the dragon decides to rewrite the law, which is precisely why you need a lawyer.