Ketsuryūgan

The Ketsuruyūgan is a dōjutsu    kekkei genkai , which appears in certain individuals of the Chinoike clan. The Ketsuruyūgan is recognised by its reddish colour, giving a special appearance for the users of this dōjutsu, characterised as holders of "eyes as red as blood". The Ketsuruyūgan confers genjutsu casting abilities. Its power earned it comparison to the Three Great Dōjutsu.

The Ketsuruyūgan also gave the users the ability to manipulate the user's blood, or more accurately the iron in the blood, allowing the user to not only manipulate their blood, but any liquid with high iron concentration.

Trivia

 * When written as 血流, ketsuruyū means "blood flow".

pt-br:Ketsuryūgan Ketsuryugan Ketsuryūgan Ketsuryûgan