Open the Market from the Contract Dragon Clan

When Shen Yun woke up, he found that he had traveled to a fantasy world called Daqian, and became an ordinary child of a small family. His previous talent was mediocre, and he thought he would not be able to achieve much success in martial arts, until he found a navy blue dragon seal in his Dantian that followed him through time... [Contract Dragon Clan: Black Water Snake] [Skills: Venom (making the host's attacks have poisonous properties), Possession (partially or completely controlling the body of the contracted dragon)] [Optional evolution path: black water python, materials required for evolution: 100 kilograms of spirit beast meat, one bone elixir...] From then on, the snake turned into a python, the python turned into a dragon, and the dragon turned into a dragon. He led thousands of dragon clan members and embarked on a path of immortality that no one had ever embarked on before!