Very straight forward. It’ll take some time, but if you just keep playing the game it will happen eventually. And the components you pick up on the way to the final boss are mostly useful too
I have 19 extra dragons now. It has not happened.
Let’s break it down into some cumulative costs:
- You need 6 Gem Dragons (x500D). Because they are random, it statistically averages 15 eggs (7500D) to complete the set.
- You need 3 Weapons, for a total cost of 2000D.
- Then you need an extra 1000D for Diamantina itself.
So, statistically you need 10500 cumulative Dragonite to get Diamantina.
Given that Dragonite is valued at 5 Gems per piece, that much Dragonite would cost up to 52500 Gems. (Minus the free sources like Perfect Runs, Wandering Angel rewards, Campaign/Underspire rewards)
The new Cosmic Dragons cost 10% more than Gem Dragons (550 per Cosmic Dragon Egg, vs 500 per Gem Dragon Egg) and likely follow a similar overall process (get dragons → craft weapons → get final dragon), so you can calculate it the same way.