Sanpaku

Sanpaku, otherwise known as the "Dead Eye" is a dojutsu/Kekkei Genkai that only a member of the Katuko Clan may obtain. Each 500 years, one member of the Katuko Clan obtains this eye. The abilities of these eyes are limitless, it does not only increase your physical abilities but also doubles your chakra level and the power of any ninjutsu that you use. As well as genjutsu is ineffective to these eyes. The Katuko Clan is known for this Kekkei Genkai and the outrageous power of it.