Hebi

Basics:
At first there was Sasori Clan. It was made by a great man many, many centuries ago. Tough they we're little in numbers, they we're very well known because of their exceptional and excellent skill with Sealing, Unsealing and Summoning. At first, it was known to summon scorpions.

Kekkei Genkai:
The creator of the clan had learned the greatest ability of the clan, the NenGan(Black eyes). It was named so because when used, the user's eyes turned black, but the true meaning of this doujutsu was to make a connection with the world of the summons. The user's eyes went into the World of The Summons making a mental connection with the user's summons. The user could actually summon creatures with no handseals or even sacrificing any blood.
As time went, great ninjas discovered more about the NenGan and the connection with the summons. By a lot of training and experiments the strongest Sasori ninjas could also use the connection to implant the eyes of the creature as a part of their eyes. It made even a better connection with the beasts and give the user some of the beasts' abilities. So the NenGan no Sasori (The black eyes of the Scorpion) was created. Usually, only Jounin level ninjas could use the advanced NenGan.
After a long time, a great ninja, the best of the clan actually discovered another feature of NenGan. When having a strong connection with the World of The Summons it was actually possible to improve the previous doujutsu to unbelievable levels. This move was called SasoriGan (Scorpion's eyes) and was ranked as S rank jutsu. It was thought for this jutsu to become the ultimate weapon.

The Separation of Sasori Clan:
Sasori clan used scorpions as their summons. They were used to to do heavy damage in close combat and to have great defences, but even defences couldn't resist all, so the weakness of Sasori Clan was long-range combat.
It became obvious that using different kind of summons would make them capable to fight long-range as well. After long discussions some parts of the clan started using diffrent summons, while some still used scorpions. There were birds, wolves, toads, bugs, spiders, rats etc. One of summon section was also snake.
The whole Sasori clan agreed to separate themselves according to their summons. Sasori was the head clan, while the others were sub-clans. The sub-clan that used snakes was called the Hebi.


The Unholy tragedy:
As the wars started, Sasori clan, Hebi clan and others were ready to exchange their lives for their country, the Kumo, Land of Lightening. Most of them died. Sasori clan, and many of it's sub-clans extincted. Tough Hebi was the strongest sub-clan there was, they sacrificed themselves. After the war, pitiful numbers of the clan were left. There were rumors that other sub-clans had survived also, but rumors are rumors, no one has heard of any other Sasori sub-clan's member alive. Tough there also some rumors that these subclans had renamed themselves and gone to other countries, rumors are still just rumors.
Now the Hebi clan was alone, no head-clans or brother-clans. Hebi was alone, just them for themselves. Hebi was strong, they were sure to survive. Actually, Hebi was so strong, that Hebi clan's Head had actually opened HebiGen.
Also, Hebi clan showed their loyalty and skills to others by having a great part of inventing the jutsu to seal the tailed demons.

Nowadays:
Now there is only one family(a big family) of Hebi left, but they are strong. They had invented a lot of clan jutsus and everyone so far, with time, had achieved Hebi No NenGan(Hebi's version of Sasori no NenGan). They are proud with themselves and swear to bring their might on feet with time.

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