Fire ball justu

The fire ball justu was conceived back in ancient times for its time it was an revolutionary weapon that could destroy entire nations but now it is the most basic justu anyone could have and an essential tool for anyone that even knows how to use any type of fire justu. It works by compressing an amount of your energy onto one appendage and then releasing it into one fire ball that travels far, the more energy you use the bigger it gets and it has a lot of variations like the homing fie ball which is a fire ball fused with lightning spinjiju to create a blue color  fire ball that chases its opponent