Rise of The Villain Starts From Signing-in

Author's New Book: (Transmigrating Villain Cannon Fodder, I Start Killing the Main Character's Family) Transmigrating to the novel he read, Jun Haotian actually found himself a small villain. What's even more tragic is that he found out that the time he transmigrated is not right, the main character has already fully grown up, he, the small villain, could receive a bento box at any time. "Ding! Congratulations to the host for obtaining the Sign In System!” Fortunately, Jun Haotian has the Sign In System. At the start of signing in, he obtains the Divine Elephant Overpowering Art, directly smashing the main character's father to death on the wall.