uncommon

Weapon Break

Shatter weapon, -30% ATK

physical (PA x Brave x facing x height, mitigated by DEF)

Job: Sworn Knight
MP cost: 8
Charge: Instant
Power: 8
Range: 1 tile
Area: single tile
Targets: anyone in the area
Accuracy: 60%
JP to learn: 150
Applies: Weapon Broken — 3 turns

Rolling it

Nothing is guaranteed. At the start of each battle a unit's primary job rolls every ability it knows, one at a time.

As your primary job: 50%
As a sub-job draw: 30% of the bucket

Roughly one unit in 150 skips the roll entirely and fields its whole catalogue. If a unit rolls nothing at all, it is granted its cheapest ability rather than being sent out empty-handed.