|A Secret Power|
|Time of day||Day|
|Number of units||9: Riela, 6 empty slots|
|CP||Start 6(+3), 6(+3) per turn|
|Turns for A rank||3|
|Objectives||Occupy main enemy base camp|
|Failure conditions||Enemy occupies allied base camp|
Morale 0 / All allied units defeated
20 turns pass
|Enemy ace(s)||シラー練兵 (Tyro Schiller)|
A Secret Power (この力で守るもの) is a downloadable content for Valkyria Chronicles 3. The DLC contains a mission called 'この力で守るもの' and can be purchased for 600Yen from Playstation Store. In the Valkyria Chronicles 3 Extra Edition, it is among the several DLCs already included with the game.
Prior to the battle on the Naggiar Plains, Riela was sent out on a scouting mission to Aslone as part of a plan to defend it against imperials. By the time Riela arrived, Aslone had already been occupied by imperials and Riela was discovered. In order to move more swiftly, Riela had left her Valkyrur weapons behind, and therefore had no way to defend herself against the overwhelming odds. Fortunately, Riela discovered that the knife she always kept with her possessed a power similar to that of the Valykrian lance and shield. Armed with this new knowledge, Riela managed to fend off her attackers. When Kurt and the others arrived, Riela had already cleared the imperials out of Aslone. As a reward, Riela was treated to a relaxing vacation on the beach with Kurt.
- This mission is probably one of the best missions to farm for Class Proficiency levels; in Area 2, up to six units spawn in a fairly convenient cluster near the connecting camp at the end of the enemy phase. One can clear out the rest of the stage, have a Shocktrooper parked in the target camp to defeat the enemy that spawns from their during the enemy turn, and spend defeat the respawning enemies in Area 2 until the twentieth turn.