> I'm gonna throw in my own 2 pence into this is stating that to further prevent that soul'spirit skill from getting to OP'd that it should strain the body of his char also as he would be using a forgein soul/spirit and the longer it's used the more strain his body goes through and the srain would weaken his body till he's had enough time to recover, and example would be 1 minute would = maybe 2-5 minutes to recover with repeated use above maybe 3 or 4 times a day would put him into the hospital from the strain put on his body as i think summoning up a soul'spirit from the pure world {The naruto verse heaven/afterlife} would tax their chakra but you also got to take into the shinigami also as i'm sure he/she/it wouldn't take to kindly to such a clan able to summon beings even if only from their past family from it's domain after all it is the GOD OF DEATH so you have to take into limits that the Shinigami would also put onto such a clan such as possible eternal pain in Yami {Shinto version of hell}

what are you talking about? the shinigami is a technique, never has it appeared as anything else than a technique. My character's spirit bond technique requires a lot of chakra and if he is not in harmony with the spirit then it becomes hard to control, that means if he gets into an argument with the spirit then the technique will falter and he will be vulnerable.