I'm a Slime, so It Makes Sense to Start by Devouring the Dragon, Right?

When he woke up, Jiang Chen was surprised to find that he had become a slime, and there was something called the [All Things Devouring System] in his mind. In this world where strange beasts are rampant, in order to protect himself, Jiang Chen placed his first target to be devoured on the giant dragon that covered the sky and the sun and breathed out fire! "Jie, Jie, Jie! Tremble, dragon, Master Slime will swallow you in one gulp!" ………… My name is Ling Feiyue, and I am a freshman at Xuantian War God College. I am known as a genius beast master with golden talents. In order to become the supreme mythical beast master, I set my sights on the legendary supreme overlord hiding in the dark forest! The golden dragon, Gomodo! However, when I went through all kinds of hardships, arrived at the dragon's lair, and initiated a contract with the sleeping dragon... A tiny slime suddenly appeared in front of the golden dragon. Looking at the signed contract suspended in the void, I felt that I was probably useless! …………