The fire pills were mostly focused on raising up the resistance and allow the kids to feel the fire qi better. Everyone had more or less accepted around 50% of the pill's qi. It was fine because their small bodies had yet to feel the power of an alchemy.
So it was amazing feat to accept 50% of the qi.
With the fire resistance, the kids began spreading more of their influence. They weren't that scared of the fire like in the beginning. The phoenix's flames were not only scary, but also beautiful. However, at this point, the kids were seeking the beauty of these flames only.
Beating the devastating concept was the common routine!
They ended up entering the flame river to bathe, taking a strong front against the divine land! Such display of power and will was outstanding, even for Mr. Prince. With him by their side, the kids felt like they can do it!
They also had to repay for all the teachings and resources.