It will use up a lot of VR joker orbs at once, especially if you don't have that many of either dragon yet (can be gathered from those random dragon orbs chest from calenders and events, but chances of getting what you want are slim), but if you aren't aiming to summon any other VR dragons, it'll be a good investment for Puzzles in the long run.

Otherwise, you can buy some orbs of Double Electric (not sure whether got Double Nature) in the orbs shop using a few gems, then wait until the next Happy Hour and use VR joker orbs to replace the remaining number of orbs you need. Is there any good ways to breed a nature and electric gummy dragon Its really a pain in the ass when I dont have double nature or double electic dragons. It wouldn't guarantee a Gummy (you can check the odds using the breeding calculator first before breeding them together), and you might get multiple Nature and Electric dragons, but you'll get there eventually. You will need empowered dragons to successfully get the Storm Bringer Dragon via breeding. This dragon requires Reborn Level 2 to breed.

If you have other Nature-Electric dragons like Stressed, Hawaiian or an existing Gummy dragon (from Dragon Rescue if you haven't got any yet), you can try breeding with each other or with a Nature/Electric dragon. The Storm Bringer Dragon is breedable by breeding one dragon with Legend and one with a Wind element.

Dragon city breed gummy