The Sakituya Clan
The Sakituya clan dates back... Far back beyond the storyline of Naruto. The five great nations were just starting to pull together. The Sakituya's were loyal to nobody in particular, sometimes it would be themselves for their own desires, sometimes to another clan or government for wealth and power.
No matter who they were fighting for, they fought powerfully. Their Kekkei Genkai was an ancient form of the Byakugan. Though it lacked the ability to detect projectiles and see the chakra network, it could still see for miles around. It also slightly improved ones reflexes. It had no official name, for it doesn't operate at will, most of the time. The elite of the clan mastered using it when they wanted, but for most, it simply sprang into action at stressful times, and when the user was suprised suddenly.
When it did activate, it proved to be a great weapon. In addition to the improved reflexes and longer line of sight, it paved the way for long range attacks. Being able to see far away, the user could potentially shoot a jutsu into the air, and direct it down like a missile to an enemy up to a mile away. (Assuming it was active, and the user knew the enemy was there.)
Check your PMs please! ~ Van idea