Wings of fire book 1 The dragonet prophecy

In the first book of wings of fire it talks about a prophecy. The prophecy is about 5 dragons ending the war. There are different types of dragon like, sea wings, ice wings, mud wings, sand wings, rain wings, sky wings, and night wings. The dragons In the prophecy contains a sea wing, mud wing, sand wing, night wing, and sky wing. When they were stealing the sky wing egg it got smashed so they replaced it with a rain wing. They spent 8 months training in a cave until they wanted to escape.