Shinsu Sword

Shinsu Sword is one of many types of Shinsu shape. It changes the shinsu of the user into Swords. Not much information known about this skill, but it is a rare skill and only few people were seen to use it. Hoaqin was the first person to display Shinsu in a shape of swords.

Hoaqin
Hoaqin has so many shinsu sword forms and it change forms as his power keeps growing everytime he consumes souls, until he regain his peak prime power as Slayer White.

Twenty-Fifth Baam
During the battle of Dallar Show against Hoaqin, Baam was stabbed in the chest by White's Final Clone in order to boost his power. The Clone decided that she will give the power of 1 billion souls to Baam because he's worthy and kind. After Baam obtained such tremendous soul power, he was able to form a shining golden shinsu sword purely made out of shinsu.

White
After Hoaqin finally merged with his Final Clone in the Battle of The Last Station, he became Slayer White and regained much of his power but not all of it because Baam stole the power of 1 billion souls. White continued to stay in that form until Part 3 where he infiltrated the Wall of Dohwa to help Baam hunt down Kallavan. When White finally met Kallavan inside the walled city, he displayed a new sword form, a red sword he called "Spinel".

Skips to the Battle of The Nest, White regained his prime power and confronted Kallavan. When White realized that his normal shinsu sword began to wear out and did not do much damage to Kallavan, he displayed another shinsu sword called "Cullinan" which he claimed to be his "most durable" sword.