Unjustice (
Description[]
When the user looks at a target with their eyes uncovered, Unjustice allows the user to negate a target's sense of "Justice", causing them to act opposite to their goals and morals, such as attacking someone they wish to protect or killing themselves. Unjustice requires the user to know what the target's vision of justice is, as Victor mentions Unjustice had never worked on him before he tried to kill Juiz and revealed what his sense of justice was, where the ability then worked on him.
As hypothesized by Fuuko and later confirmed by the Master Rules, Unjustice is different from other negations, with it being stated that it gave Juiz a specific and immense advantage that allowed her to defeat the other Master Rules in the past, even able to counteract Juiz's corresponding UMA, Justice. This advantage was so overwhelming that the Master Rules couldn't conceive of any other ability being able to face them, causing them to underestimate the Union.