exactly... the one used on sasuke to keep the curse seal in check would be the way... yet it can be broken.
@sealing demons inside you
ok, we can do that.
I will make it realistic: you get eaten away by the demon inside as you are not used to it nor did someone sacrifice his life like the Fourth to make the seal foolproof and has had the great wisedom necessary to make even the user mostly safe from its power.
So lets say you can use it from 90-120 game days, then your body explodes and the demon hacks his way into freedom...
no, you will not simply die, your character will go to 0 oro kills, no houses, no gold, no gems, no mount, no jutsus... you will play again as a new born academy student
Deal?