Chinomizugan
(血の水眼)
Literal English: Blood Water Eye
Abilities: Can control water, and its temperature. So basically it also has ice release, boil release, and storm release. It can also fuse with the ground to create mud release, not wood release because, NO. If you are about sakura+ chakra control, you can take water out of people's body and dehydrate them. OP already I know. It does have a lot of cons as well.
Cons: You can only have 1 jutsu of each kekkei genkai, and only 2 other jutsu that is not one of the kekkei genkai's. After using a lot of water you die after 5 years depending on how much you use it (max is 40 years). Also at some point, if you do not have the strength to hold this dojutsu water just repels from you. The only las remaining water you'll have is the body inside of you. If you're pretty powerful, but only have the bare minimum to control it, it will attack your friends no matter what. Not enemies but friends.
Acquisition: First you need to be from Kirigakure. Then you need to have water release. Then, you need to kill a user with one of the water kekkei genkai, (not including wood release). Then you need to kill another person with the water release. You will then awaken the Chinomizogan.