Ultra Dragon

The Hydro-Dragon is all the dragons when they grow up. The four dragons went to the Spirit Coves to grow up. They were combined into one. When the Great Devourer was unleased, Lord Garmadon went to the Spirit Coves to ask the dragons for help. The dragons helped and weaken the Devourer. They were hit and fell to ground. Just then, Garmadon jumped from a building onto the Devourer and killed himself and the Devourer.