Shireigan

The Shireigan is the Kekkei Genkai of the Jūrai clan. The Shireigan allows the user to forcefully summon those that they have not formed a summoning contract with, however unlike scroll-summons it requires only a small amount of chakra. In addition to summoning creatures at will the user can also form summoning contracts with those they have summoned. Without the consenting of the creature being placed into the contract. Finally it lowers the amount of chakra required for summoning high-level creatures allowing Jūrai clan Genin to summon such beings as Gamabunta, and, even the Three Giant Snakes alone when it usually requires multiple summoners.