I May Be a Magician, but I'm Actually the Holy Grail

Bai Xiao transmigrates into the world of Fate and discovers he has become a Holy Grail with an exceptionally noble and pure bloodline. The Nine Heavens Supreme Holy Grail! In the room where he is, Sakura has just been adopted by the Matou family after Tokiomi Tohsaka, that inhuman bastard, gives her away! In a little while, Matou Sakura will be sent into the worm pit to endure inhuman torment. At that moment, Bai Xiao’s System awakens! He can absorb mana and convert it into evolution points, allowing him to evolve and grow stronger without end! But he currently has a lifespan of only ten years. To extend it, he must devour other Holy Grails! Fortunately, the Holy Grail War is not over yet! He still has a chance! But his level is too low for now. The only way he can gain mana is by absorbing things like a mage’s blood! And right now, Matou Sakura, in this very room, is a mage.