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Yatsu
Lightning Detection via magnetism.

Animal Summoning. Crows?

"Blood Seal" When destroyed, sends out a burst of...?

Increase blood flow to increase adrenailine and whatnot...then the stop of blood flow to remove KG limit.

Just a few things I need approved. I don't care when you get to them...

Yatsu
Ketsuekijunkan - Blood Circulation - B
By using the KG of the Yuusha Clan, Yatsu can manipulate his blood.
By storing up chakra (two charge post) in his chest, Yatsu can create a surge of blood throughout his body. This increases adrenaline, making him immune to small amounts of pain for two posts.
Furthermore, due to the surge of the blood flow, Yatsu can temporarily survive and function regularly even with his heart stopped. In fact, that is what happens. In the post after the surge of blood, his heart stops. This lasts for three posts.
The only useful thing this can be used for is to remove the limit on the Tetsumune Clan's KG. Since blood flow from the heart is what prevents them from converting that area of their body into metal, stopping the heart allows them to do so, thus allowing Yatsu to protect the most vulnerable part of his body; albeit, for a short amount of time
This technique has a cooldown of ten posts (post one is when the heart begins pumping again).

Mangekyou Sharingan: Genmetsu - Disillusionment - S
Given that Yatsu only has a sharingan in one of his eyes, this is his only MS technique.
It's not really even a technique, either. It's more of a passive ability related to genjutsu.
The Uchiha have been known to be effective against the effects of genjutsu. This ability takes it to another level.
With it, Yatsu gains a complete immunity to genjutsu, and much like the Uchiha themselves can do, causes any genjutsu attempt against them to affect the user of the genjutsu instead. Even more so, however, everyone in the surrounding area is also affected. Yatsu is unable to control this ability, so even his comrades are affected.
Unfortunately, it comes with a drastic downside. Depending on the rank of the genjutsu used, it limits his own ability to use techniques. If it's a D-Ranked genjutsu, Yatsu can only use C-Ranked techniques and higher. If it's an A-Ranked genjutsu, he can only use S-Ranked techniques and higher. This downside only lasts for a single post (the post after Yatsu "defends" against the genjutsu).


Kanshin/Tenson Clan
Archangel of Ashes
Mukanshin's abilities after obtaining Archangelism is essentially a new chakra element known as Haiton (Ash Release). Some might view it as an extension of Katon, because it deals with heat energy, but aside from that heat energy, the two share very little in common.
In general, Haiton relates to converting Kanshin's body into Ash, and then using it strategically, although it can be done with other objects as well.
This is all done by increasing the heat energy in a very small area (well, not necessarily small, but the effects only take place in a designated area - so with actual ash techniques, the heat is generally not felt by others without physical contact), thus converting anything in that area into ash, which again, is normally Kanshin's body.
Naturally, Kanshin's body is now immune to the effects of heat energy, both in terms of increasing it and reducing it.
This does not, however, mean fire and ice techniques are ineffective. Fire techniques add heat energy to ash techniques, causing the ashes to burn even more, which often lowers the range of the ash techniques. Ice techniques essentially take away heat energy from ash techniques, causing them to lose their ability to burn.
Additionally, Haiton does not have to literally deal with ashes. The general principle is the ability to increase heat energy in a very contained area, which adds another list of possibilities.
Lastly, when attacked by physical (and unranked) techniques, Kanshin has the ability to convert his body into ash, which causes the object to simply go through his body. He can then cause the ash to quickly reform into his own body again.
Note: This does not grant an immunity that is not already present - if you recall, they do receive an immunity from unranked attacks due to Divine Protection.

Summary:
The only thing they can do naturally (the manipulation of the element) is convert their body into ashes when attacked by an unranked attack. And then an immunity to heat energy.