This unique bloodline is the ability to create ice on the whim and to travel through it. They can also perform jutsu only using one hand.

Generations before the rise of Hyougakure, the Shichiyou was ruled by a man, Shichiyou Tenzou with an aptitude amount of knowledge of how water worked. He developed various skills and techniques that involved ice and all aspects of it. He was famous in his power and capabilities for the area was covered by a frozen tundra. He started to built a shinobi village in the Blizzard Country to create place that provided security against enemies. It was going to be a long long road. Unfortunately, he passed away before he could finish his life's goal.

Luckily, he had a son that continued his legacy. There isn't much information about this. Just that he signed a pact with a demon to gain more power, to increase the speed of his work. There was a certain price though. The demon's power shall run forever through the main family's first son of each generation, giving them red eyes. And the demon would be able to use their body's sometimes causing them to have a split personality disorder.

This man gave birth to three children. Three boys. And indeed the first son had red eyes while the other two had regular blue eyes. These three men eventually finished their grandfather's work. They founded Hyougakure together. All the residents of the local villages moved to Hyougakure. It was a beautiful and amazing place, just like a fairy tale. An enormous village that provided security to everyone.

The three created Shichiyou's Monarch which is Hyougakure's outer wall, the city's thickest layer of protection. The wall was huge. Easily a hundred meters tall and perhaps fifteen meters thick. The wall encircled all of Hyougagakure. It is considered indestructible and is commonly drawn on maps as a terrain feature. It has never been breached. The council mandated that soldiers and sentries would be placed on the wall at all times, with many of them even living in built-in homes inside the wall.

A couple of years later one of the branch family leaders died during the war with Kazangakure. He was leading the a small shinobi squad, nothing more. Kazangakure wasn't a match since they couldn't handle the cold. Heavy winter blizzards constantly pelt the tundra, and unstable ice sheets often gave way under the slightest pressure. The man died with a smile on his face as he crushed several platoons at once saying "You never managed to enter our village." The two remaining brothers were saddened by this tragedy. Shichiyou was left with a main family and a branch family.

Decades later the Shichiyou clan was increased in numbers. The amount of the main family could be counted on one hand. The amount of the branch family was a bit bigger. The main family lives in a palace and are referred to as the royal family of Hyouga.