It was a Lightning elemental ability that was unlocked by Conjurers at rank 36. It had an action cost of 3, an MP cost of 28 and no TP cost. Its cast time was 3 seconds, while its recast time was 14 seconds. It could be used by any Disciples of War and Magic.
Shock II was dropped in patch 1.20. It never made a reappearance in Final Fantasy XIV: A Realm Reborn.