The Shigekuni clan

The shigekuni clan, a clan of great lava release kekkai genkai said to melt skin, bones and even chakra itself completely extinguishing their enemies existence. Their abilities for lava release was said to have come to life by an ancient relic in form of a sword wielded by their predecessor and founder, who was able to use this relic to lay waste to his enemies. The relic is said to be so powerful that at it's peak is able to rival the heat of the sun's core. And now after so many years it has once again answered the call of a boy who's flame burns the brightest and hopefully it's long life glow will be achieved.