You can only activate 1 "Danger
Getting stuck like this could theoretically happen at any other point where you fight consecutive battles if you've neglected to keep any backup saves, but none of these other fights feature such a huge spike in difficulty over the prior battles, so it would be incredibly unlikely, if not outright infeasible, that you could get to them and be completely unable to win
After you get more experience, you can try "splashing" for a color, which is where you play just one or two cards of a third color in your deck
Although once worth more than that iconic card from Evolving Skies, today its worth about half as much as the Moonbreon
There are a lot of assumptions here, and Im sure real statisticians are looking at this and wincing, but the point I mostly want to make with these charts is the following: If something has a 1/100 chance of occurring, and you do it 100 times, theres no guarantee of getting that 1/100 chance odds