What are the other three swords besides the darksteel epee chosen by Yang Guo?

The first one is a green, shiny sword, called the nameless sword. It is characterized by being sharp, powerful and invincible. It is not weak to compete with Heshuo.

The second one is Wei Zi soft sword, a sword that Dugu used before he was 30 years old. It is ominous to accidentally hurt a righteous man when using this sword, so I gave up this sword. Because this sword has been abandoned in the deep valley, not in the sword grave, represented by a feldspar piece, and it seeks defeat alone.

The third one is the darksteel epee chosen by Yang Guo.

Its characteristic is that the epee has no front, and the clever thinking is ineffective. Dugu seeks defeat, holds this sword, and runs the world by it before the age of forty.

This darksteel epee looks dark, but it has a faint red light in the dark. The blade is more than three feet long and weighs 998 1 kg. The blades on both sides are blunt and round, which looks like a hemisphere.

The fourth is decadent wood blade, because after 40 years old, Dugu won't stop at things. Plants, bamboo and stones can all be swords.