The Secret Weapon

How to obtain this mission
Repeat San d'Oria Mission 1-2 or San d'Oria Mission 3-2 until "The Secert Weapon" appears. This will happen after repeating Mission 1-2 about 8 times.

Walkthrough
After accepting the mission, go to the garden for a cutscene. Return to the gate guard after the cutscene to receive the actual mission.

Head to Horlais Peak. Only people currently on San d'Oria Mission 7-2 or people that have completed this mission will be allowed to enter the battlefield. You will need a BLM with Sleepga II. This BCNM is not capped.

Upon entering the battlefield, you will find 2 Warmachines and 3 Orcs. The BLM should run in and Elemental Seal + Sleepga II the orcs. The order of the BCNM should be Warmachine, Warmachine, PLD, DRG, wyvern, RNG. This BCNM fight is very similar setup to the Qu'Bia Arena Demolition Squad BCNM 60 fight.

Once the BCNM is cleared, report back to the gate guard to finish the mission.

Reward
Rank 8, 60,000 gil

San d'Oria Mission 8-1