User blog comment:Miskos3/Fairy Tail Chapter 505: Trump Card, Review/@comment-97.104.204.83-20161010124046

What if the Tenrou Jade is reason why Mavis cursed since in Fairy Tail Zero chapters 8 and 9 it was said that the Tenrou Jade absorbed so much evil power and the Tenrou Jade shouldn't be touched physical or risked being controled by the evil power of the Tenrou Jade. Yuri was the one to touch the Tenrou Jade, so maybe when Mavis used Law the evil power of the Tenrou Jade back lashed on to Mavis.