Treasure is the 9th chapter of Fairy Tail Zerø, a prequel to Hiro Mashima's Fairy Tail. Mavis and Zera rush to Yuri and Precht to try and stop them from stealing the Tenrou Jade. Yuri, believing Mavis' warnings to be lies, keeps it in hand anyway, but the evil sealed in the Jade takes him over, and he becomes fused with the Dragon skeleton that looms over the Kardia Cathedral, causing him to wreak havoc all across Magnolia. Mavis tries to save him, but before she is almost killed by Yuri, Precht saves her, after which Mavis declares she will save Yuri and protect her friends, for she is a treasure hunter that hunts the treasure of friendship.