Fire Dragon Bride Leona Blackbird:
Go to the Beleth's Magic Circle or Desert Quarry and defeat the Decay Hannibal, Armor Beast, Klein Soldier, Disorder Warrior, Bizuard, Mutated Fly, Cantera Tanya, Cantera Deathmoz, Cantera Floxis, Cantera Belika and Cantera Bridget
As evidence, please bring back 500 Chaos Fragments.