Practice Failed

To use the Flame of Evolution, one simply had to cover their entire body with energy and ignite it. The ignition method was a little specific since it's burning good karma around the user, but after that, maintaining it was pretty simple.

On the other hand, Flame of Regression was harder to use. Not only do you need to make sure no energy is coming out of you, but you also need to be using the Flame of Evolution together with it.

One requires you to exude energy to burn, while the other requires absolutely no energy to work properly. It was a conundrum for the users, even for Primo himself.

However, there's a workaround to this. And that is to use it on the hands and not on the entire body. The only drawback here is that since the Flame of Evolution doesn't cover the entire body, the user needs to control the energy it creates and channel it around manually.