Curasa

Curasa (ケアルア) is recurring healing spell in Final Fantasy series.

Final Fantasy XIII
Curasa is a spell available to the Medic role. It heals one target based on the damage they have taken, meaning the lower the target's HP, the more it heals. If Curasa is cast on a target with full HP it will heal a mere 1 HP. Curasa is useful on party members who are low on HP (mid yellow and red region), but useless on those who are not seriously injured. When used by the AI, the party members will only cast it on team members whose HP is below 50%. Curasa is learned by advancing as a Medic in the Crystarium System and is available to:
 * Snow at Stage 7.
 * Vanille at Stage 8.
 * Hope at Stage 8.
 * Sazh at Stage 9.

Final Fantasy XIII-2
Curasa returns as a Medic skill in Final Fantasy XIII-2, but the way it works as been slightly altered.

Dissidia 012 Final Fantasy
Curasa was a Bravery attack for Lightning usable in Medic role in the pre-release of Dissidia 012 Final Fantasy. Since this conflicts with the fact that she cannot learn it in its original appearance, it is renamed Cura in the finalized version.

Vidra