@Aragorn1 : In response to your question about “how far in is Diamantina”, I’ve found that it typically requires ~110 fights to get that far and likely requires a “budget” of 900+ Gems to purchase additional Torches. You might be able to get away with fewer torches/gems if you get fortunate in your exploration, or fewer torches/more gems if you find Merchants and simply purchase the keystones rather than search for bosses.
It’s not especially easy/quick in most regions, and it isn’t cheap.
More importantly, what will be their gimmick? For the Gem Dragons, it was Giant Gems and Doomskulls for Diamantina and for the Cosmic, it was Dragon Gems and Elemental Stars for Stella.
I honestly still think that that the new batch of dragons will have colored mana potions for the 6 different flower dragons, and then the final dragon will create wildcards. I don’t see any other way to color coordinate the upcoming dragons from the soulforge besides this.
(Unless they added other heroic gems to the mix, but using Ctharrasque makes my head hurt, and I hope the new dragons don’t make the board too chaotic).