There was no particular reason why Ji-woo decided to let Yu-jin join the training. If one needed to become nitpicky, it was because the practice wouldn't last long. He was a person who had no Mana, and his knowledge of it was also limited. Teaching them one or two ways wasn't too hard. After all, they wouldn't bother him much since he was the one who arranged their meeting schedule later.
"Magic of Fire, Phoenix spirits!"
Yu-jin spread her arms, and three phoenix-shaped flames appeared above her head. She then threw it at Ji-woo in a hurry. She didn't stop with that and used another magic spell.
"Magic of Fire, God's Arrow!"
Yu-jin's palms clapped forward. Her hands shone, and a big fiery arrow appeared, enveloping them. She shot three fire arrows in succession behind the Phoenix spirit.
The magic spells were enough to send heat all the way to Dong-hyun, who was some distance away from Ji-woo and Yu-jin.