Obtained: When Kiria reaches Stage Rank 10, head on over to Fortuna Office and speak with her to trigger a cutscene.
After you receive another Topic from Kiria saying that Tharja finished the preparations, head on over to the Shibuya Idolasphere and teleport to Block 3: North (2F). Enter the boss room with Kiria and Tsubasa in your party to fight Tharja’s Mirage golems, Bord and Cord. Both enemies are level 44 and all attacks you have will not work on them. As a result, you will be given a new skill, Seducing Pose. You will need to use this attack on both Bord and Cord in order to allow the enemies to take damage. This attack will also Charm them so defeat them before they become un-charmed!
After the big battle, Kiria’s “Door of Reincarnation” Radiant Skill will be ready, so head on over to Bloom Palace to unlock it.