The Treasure-Chest Hunting Vampire

Ye Ming transmigrated into a world full of fantasy, where various races reside and wage never-ending wars.
The bad news is, not only has he become a Vampire, he is a Last Generation Vampire, the lowest class in the Vampire hierarchy.
The good news is, he managed to activate the Treasure Chest System. Surprise now awaits him around every corner.
He found a silver treasure chest in the courtyard and obtained the [Viscount Blood Essence].
He found a golden treasure chest in the study and obtained the {Ancient Blood Refining Technique}.
He found a golden treasure chest in the ancient castle and obtained the [Vampiric Dagger].