Forced to Go on a Blind Date with a Good-for-Nothing Saintess from the Start

My name is Lin Xian, and just as my name suggests, I only want to lie flat as a menial disciple, eating my fill and waiting to die. But on my very first day at the sect, I accidentally swallowed its supreme treasure and was punished with three thousand years of solitary confinement! Unexpectedly, this turned out to be a blessing in disguise: I gained eternal life and lived in carefree comfort in the forbidden grounds. Three thousand years later, the sect had nearly forgotten me, but suddenly dragged me out to attend some matchmaking event. My match was a good-for-nothing Saintess whom everyone looked down on? I was ready to keep slacking, but then I unexpectedly activated the [Dao Companion Sharing System]! The stronger my dao companion, the stronger I become. For every point I give my dao companion, the System gives me ten! As the once good-for-nothing Saintess rises to the peak at my side, and peerless prodigies from all walks of life clamor to form a bond with me, all I can say is: I really just want to lie flat! But this invincible life won't let me...