Solve an Encryption Block puzzle 1 time.

Complete "The Past is the Future".

Defeat the Crownless for the first time.

Upgrade all skills of any Resonator to max level.

Equip one 4-Star or above weapon.

Obtain the Echo of the Bell-Borne Geochelone for the first time.

Complete "To the Shore's End."

Complete "The Eternal Concert".

Complete "Shadows of the Past".

Upgrade a 5-Star Echo to max level.

What on earth is that twinkling thing...

Completed the Charadrius.

Consulted Gallica 100 times.