The term "dual Dao swords" refers to the concept of wielding two Dao swords simultaneously, one in each hand. While the specific term may not have historical or traditional origins, the practice of dual-wielding swords does have some historical basis.

In Chinese martial arts and historical combat, there were techniques and styles that involved dual-wielding weapons. This includes the use of two Dao swords, also known as "double sabers" or "paired sabers" in some contexts. These techniques often emphasized speed, agility, and coordination between both hands.

The concept of dual-wielding swords is also seen in other cultures and martial arts, such as the Japanese style of kenjutsu with the technique known as "nitō-ryū" or the use of two swords simultaneously.

It's important to note that while dual-wielding techniques can be seen in various martial arts and historical contexts, they are typically specialized techniques that require advanced skill and training. Dual-wielding swords in combat situations can be challenging and require a high level of coordination and proficiency.

In modern practice, the concept of dual-wielding swords is often seen in theatrical performances, demonstrations, or in the context of martial arts choreography. However, it is important to distinguish between the historical application of dual-wielding techniques and their use in staged or stylized performances.