Shinken no Tsurugi

An ancient, extremely powerful sword with a crimson jewel embedded in the pommel that was imbued with the Seikoki no Chikara long ago. The jewel is a vastly inferior version of the Hoju no Tama. Like the Hoju, the sword is one of the objects held in the Sacred Grotto (In'ei Temple). It was once wielded by the temple's founder, Hozoin In'ei, and is capable of performing all of the Kekkai Ninjutsu of the temple with extraordinary strength, activated via thought command. In addition, a ninja skilled with Chakra Flow can stream the Seikoki chakra from the jewel through the sword, and also through their own body. When the wielder uses either the Kekkai Ninjutsu or its chakra flow ability, in five minute intervals the sword will forcibly absorb a great deal of chakra from its holder, converting it to replenish its seikoki. It is indiscriminate in this effect, and can cause the death of its wielder. In this way, its drawback is similar to that of the Shichiseiken, one of the treasured tools of the Sage. To avoid the massive chakra drain, the user can elect to flow their own chakra into the jewel to use the barrier ninjutsu rather than rely on the jewel's reserves of seikoki. The barriers will be composed of normal chakra, and therefore will be much weaker. However, in some cases this is the wiser option. It is based off of the Hōken, a sacred ritual object in Buddhism.