Source Veins

Gelel Vein (ゲレル脈,Gererumyaku) is a source of life energy contained in a minerals often appearing a stones. The energy of the vein, when embedded into a person's body, grants them incredible regenerative powers as well as seemingly halt ageing. Those who have the stone inside their bodies can manipulate Gelel energy for combat purposes.

Shiogakure
Tide Vein: Located in the underwater village of Shiogakure. Unlike other veins, it is known to be manipulated with a weapon, which acts as a controller. In addition to this, while other veins often appear as stone like minerals, this vein appears in a a more liquid state.

Land of Demon
Demon Vein located underneath the village of Seishingakure within the land of Demons. Unlike other veins, it is usable by five original families of Seishingakure.

Trivia

 * It is noted the color of the energy produced by the veins is different for every vein.
 * The concept of Gelel Veins is loosely based Ley lines.

Also See

 * Dragon Veins