Originally Posted by Unregistered

That won't change a thing, at the rate the lvl 100 dragons pop, you are already selling lvl 5 and lvl 1 by the boat loads and they even sell for the same amount. As is, getting 1 lvl 100 dragon doesn't seem to be an issue, but there must be diminishing returns because getting a 2nd one sometimes is not possible, and getting a 3rd one is impossible on the same day. All of which means that to evolve a yellow you need to start farming bloom dragons 3 or 4 weeks in advance, who does that? To evolve a rainbow you need a month or more to get it, and then another month or more for the dragons, it is no fun!

Ahem I would disagree. Once I have gotten 3 100lvl dragon out of 4 chests in a single run.
Subsequently in different ones to this one I have gotten one of them, and in the second one 2 of them.
Id say its totally random with certain low threshold. And you just roll the die at the end of the map. If lucky you might pull a biggie.
If not you can burn through your whole stamina and gain jack sh*t is the way I am seeing this.