uncommon

Holy Shield

Absorb next 25 damage

Job: White Seraph
MP cost: 14
Charge: 2 CT — the caster is out of the turn order until it lands
Power: 25
Range: 3 tiles
Area: single tile
Targets: ally
Accuracy: sqrt(caster Faith x target Faith) + caster MA
JP to learn: 250

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.