Memory Seal

This is a powerful but also fragile genjutsu that seals the targets mind within a memory that the user chooses. These memories are often chosen for the emotion that the user desires, thus allowing for different effects on their target.

Joy
This version specifically uses a happy memory from the target in order to subdue an opponent, even after the genjutsu wears off. Sui often uses this technique in combat in order to subdue her opponents without causing harm to them, whether physical or psychological.

Pain
This version has only ever been used once due to the cruelty of its nature. By searching out and then trapping their target inside of one of their most painful memories they're able to distract and disturb their opponent with the sudden onslaught of mental pain from the technique.