Good Luck! I Traveled Back to the Three Kingdoms and Became a Poisoner

[Rebirth + Soul Travel + System + Sand Sculpture] (Not invincible, no harem, not brainless,) The male protagonist accidentally traveled back to the end of the Eastern Han Dynasty. He couldn't eat, drink, lacked resources, and wars were raging. He just wanted to go back to the real world. Ah? Do you have to complete all the tasks before you can go back? I want to spit fire and spray water, but nothing? ! I'm just a bully, why can't you get along with me... Then don't blame me for being a loser.