Immortal: Covering the Sky with One Hand

I traveled to the world of immortal cultivation and became a disciple of an immortal cultivator. I thought I would have a smooth road to immortality, but in the end, my master just disappeared. I have no choice but to rely on myself. Add some 'Deep Blue'... Dark blue, dark blue? Oops, it turns out I don't have dark blue, so what else can I say. The protagonist chooses to hang himself, and the book ends. —— The protagonist doesn't have Deep Blue, but he also has Goldfinger. —— The protagonist of the rational style has both farming and conquest.