I'm a Useless Prince, Yet the Female Sword Immortal Has Taken a Fancy to Me

A useless prince, suffering from a terminal illness, leaves the capital to seek a cure for ten years. When he returns, he has reached the pinnacle of the world.

The emperor arranges his marriage to the marquis's legitimate daughter, but the woman everyone else avoids turns out to be a sword immortal.

The princes vie for the throne, spending years laying plans and winning over the court officials.

Jiang Lin never wanted the throne, but his brothers go too far with their fratricidal schemes.

He enters the court alone and produces a precious medicine, winning the allegiance of military commanders and overpowering the other princes.

How can Jiang Lin be killed?

The princes: Use the might of the imperial court to pressure him, forcing him to the frontier and into battle.

Jiang Lin: I command a million troops and countless experts. Wherever my army advances, no one can stand in its way!

The princes: Draw away his guards and send an expert to assassinate him.

Jiang Lin: I walk the Great Way alone. I stand at the pinnacle of the world, unmatched by anyone!

The princes: I shall cut off my own head and offer it to you.

Jiang Lin: Good!