Details about the Ukrainian Ironbelly dragon The dragon is part of the Ukrainian Ironbelly species, which is native to Ukraine. It's one of the largest dragons in the world, reaching up to six tonnes. It was used to guard high-security vaults at Gringotts Wizarding Bank, including the Lestrange Vault. Harry, Hermione, and Ron rode the Ukrainian Ironbelly to freedom after breaking into a vault at Gringotts.