Pyrokinesis

Saying nothing is impossible is quite naive. Impossible is defined as something which is not capable of happening currently, something which breaks defined laws and natural order. And trust me, things like what you mentioned clearly go against defined laws and basic science.

Also, we aren't all Wiccans.

And also, E=MC^2 has nothing to do with this.

Energy can be used to create mass, thus If we hav energy, we have mass, meaning we can technically create fire, but it would be more sensible to create heat equivalent as making real flame is pointless_

Not possible alone, or without years of charging, but still possible_

I'm quite sure you don't have a particle accelerator or any proper equipment, so no. You can't will energy into mass.

U can manipulate energy with energy, there is logical possibility, I will develop this interesting concept and se if it is possible_ If it is, this would open up a whole new world for magic users_