Starheart Bloodline
Ninja with this bloodline are said to have naturally imbalanced souls. This has never been proven, but they do have chakra that's weighted heavily towards Yang. This results in a natural boost to physical related endeavors (speed, endurance, minor healing/recouperation, fertility, energy, etc), before Chakra Reinforcement and stacks with it. However, this imbalance diminishes their natural inclination towards the more Yin-heavy ninja techniques (Medical jutsu, genjutsu, etc). This imbalance is relatively major when the ninja is young, but with enough of an investment in time and effort, this can be mitigated to a notable degree --though a Starheart's potential for Yin jutsu will always be overshadowed by a non-Starheart ninja, even if said Starheart weilder specializes in that direction.
Suffering a minor penalty to Chakra control-related techniques, these ninja have a tendency to overpower most lower rank jutsu. As a result, if a Starheart ninja specializes in ninjutsu, then you can safely assume they favor more chakra-intensive techniques.
As a result of this Yang-heavy imbalance, the chakra of Starhearts is more potent than the average ninja and will become increasingly so with age. Due to the unique manner in which their chakra saturates their coils, Starheart ninja suffer from a minor resistance to medical ninjutsu that will grow as they do. But the Starheart Clan have had many generations to examine their unique physiology and, as a result, their medic nin are largely able to ignore this penalty in all but the oldest of Starheart weilders --though they, themselves, still suffer their own penalties to chakra control and yin-heavy jutsu.
Due to the Yang-heavy imbalance in their chakra and due to the ever-increasing potency of their chakra, a Starheart-weilding ninja will always die before his or her time --the potency of his chakra overwhelming his body. Therefore, Starheart ninja are biologically compelled to train their bodies and their chakra control. While chakra control training isn't as effective for them, it does help to keep their chakra under control. Most Starheart-weilding ninja do not live to see twenty-five, but those that do are considered to be noteworthy and almost always dangerous. There's never been a Starheart ninja who's lived beyond forty.
The clan has been able to maintain its numbers due to the imbalance resulting in extremely high fertility in its bloodline wielders and maintaining a doctrine of "directed/controlled passion' that instills a habit of "thought before action" in its highly vivacious youth. This sometimes clashes with their culture of "live well" that's come about by their bloodline users living in a dead sprint towards their own grave.
Training in Yin-heavy techniques and those that demand a high amount of chakra control extends a Starheard ninja's lifespan, as it helps to bring balance to a naturally imbalanced soul. However, training along this path will mean that the Starheart Ninja will likely never be as deadly as his Yang-focused counterparts while also never being quite as skilled as other, similarly specialized, non-Starheart ninja.
Summary:
Bonuses: Physical Stats Increased, Ninjutsu Affinity Vastly Increased, Chakra Grows Stronger with Age
Cons: Vastly Diminished Potential for Yin Intensive Techniques, Diminished Potential for Chakra Control Intensive Techniques, Conditional Penalty to Receiving Medical Healing that Grows with Age, Reduced Natural Lifespan
So... is this too overpowered? Is it too weak? It's my first bloodline creation, so I'm assuming that it's shit. I just want to know how it's shit so that my next one will be better.
