I, the Chaos Slime Devour the Taizu Ancient Dragon

Lin Mu died accidentally on the road while studying ancient Taoist books and was reborn in a foreign land as a low-level creature, a useless slime. Because he died while saving others, he was favored by the system and possessed the Chaos Returning Origin Devouring Heaven Technique, with infinite possibilities for evolution. After swallowing Taizu Ancient Dragon, he obtained the innate Dao Mark and provided invincible assistance.