Wu
Master Wu is the former wise and ancient mentor of the ninja team , and the Master of Creation . [ 3 ] He is the First Spinjitzu Master 's second-born son , Garmadon 's younger brother, Misako 's brother-in-law, and Lloyd 's paternal uncle. . Wu grew up learning the way of the ninja alongside his older brother, who was infected with evil. They fought together as a team against evil for countless years, until Garmadon was fully corrupted and he was subsequently banished to the Underworld . Around a decade later, Wu trained a group of students in the art of Spinjitzu and guided the ninja in many battles against his brother and various other foes. . After Garmadon was banished to the Cursed Realm, Wu's first pupil, Morro , escaped the Cursed Realm . Wu trained Nya to harness her element , allowing her to destroy Morro's master . Shortly after, Wu later confronted Acronix , who struck him with the Forward Time Blade that caused him to rapidly age. His health was restored by the Reversal Time Blade and he sacrificed himself in a bid to defeat the Time Twins and was lost in time. . A year later, he was found turned into a baby due to his exposure to the Reversal Time Blade, and kidnapped by the Sons of Garmadon until he was rescued by Cole. Little Wu was with the original four ninja later ended up marooned in the Realm of Oni and Dragons , where he grew up again while helping his stu