(All of these are in the same locations as the Magicite mission. If you are on the Magicite mission, you will receive the respective shard first; clicking on the stone again will lead to the respective cutscene and finally receiving the Magicite.)
It is possible to cure the Protective Wards with Dancers waltz.
If all three Protective Wards are destroyed, the Confrontation ends and you have to retry. You will receive a message suggesting to wait some time if you check the bulwark after failing; simply have your party or alliance all zone out and back into West Sarutabaruta (S) and check the Bulwark again to restart the battle.
If you accidentally zone during or after the fight, you will have to re-zone twice to retry.
It is not necessary for party and alliance members to be on (or past) this quest to assist in the fight. Members with no progress in the storyline can still engage and deal damage.
As the battered Federation forces prepare to defend their city from the approaching hordes, the inscrutable Robel-Akbel schemes in his dark chambers. What terrible secrets lie behind his mask? Deliver the magicite he seeks, and long-sought truths just may be revealed...
SPOILER WARNING: Click here for additional details about this story line.