There is a site to help you with breeding, battles and general Dragon Story information. It is not put out by the game makers, Storm8,so we are not allowed to mention it on the forum.
If you google Night dragon dragon Story, look for Dragon Story Wiki,
FANDOM site. From there go all the way to the bottom of the page & click "Full Site" In the top menus click "strategy" and you will see a breeding calculator and battle calculator + more. These are excellent tools that players put together to help.
For breeding if you use the pull down menu and "Magic" and in the next menu "Water" then calculate; it will show all of the possible outcomes from breeding these 2 and their breed times as well.
There is a search you can use to check info on any dragon. If gives lots of information!
If you collect tickets from Bingo, you can craft quite a few nice dragons. For example, Neo Black dragon requires 95 tickets.
Let me know if this works out for you.