A Reborn Martial Arts Waste? Shh! Watch Me Transform into a Dragon

[Academic style + human transformation into dragon + rebirth of the strong + rise of waste + no system] In his previous life, Lu Yuan sacrificed his life to slay a dragon, but was assassinated by his wife and best friend. After rebirth. He transformed into a giant dragon that wreaked havoc in the city. The enemy from the past life is right in front of you. Revenge is about to succeed. However, the giant dragon suddenly ran out of energy and shrank into a human high school student. "A useless person in cultivation can actually transform into a giant dragon?" Lu Yuan felt unbelievable. He found a bad gambler with no talent for cultivation. He can actually transform into three forms: [dragon], [dragon], and [human]. But the original owner of the body was addicted to gambling and owed a huge gambling debt. Creditors come to demand debts. His mother was completely disappointed in him. His sister wants to sever ties with him, and the school beauty laughs at him for not overestimating his abilities! On the surface, he is a useless person with a blood fusion degree of 0%. But the dragon's essence and blood do not need to be fused, and can directly swallow 100% of the beast's blood! "I was a powerful person in the heaven realm in my previous life!" "I've had more fights than you've ever eaten!" "Competition on campus? Is it strange that a loser beats a genius?" "Ranking in the martial arts exam? I'm an elite fighter!" "Martial arts college entrance examination? If I can't do it, I will transform into a dragon!"