Cultivation: A Baby System Activates on My Hundredth Birthday?

After transmigrating into a cultivation world, Liu Yun finally activated his golden finger on his hundredth birthday. But what was this Baby System supposed to be? "Ding! Host, please drink enough milk as soon as possible! Reward: one cultivation technique." Liu Yun: I'm a hundred-year-old man, and you're telling me to go find milk? To get stronger, Liu Yun decided to complete the task. And so...