Shortly after, he reached the 3rd level.
'Level 3 --Memory Alter.'
'Changes memories, creates illusions and disrupts the opponents' senses of their surroundings. At this level, one will obtain the prerequisite to learn the first Profound for this technique -- Radiant World.'
This was the exact move that Ninox used against Tu Lan last time, forcing her opponent into an illusory world. However, because she didn't have enough energy, she was countered by Tu Lan's Blood Breed ability Illusive Counter, who then managed to break out of her world.
If it managed to succeed, Tu Lan would be stuck in an illusory world fighting against an undying Ninox. No matter how many times she killed her, Ninox would just revive again at full strength.