Instant Healing is a skill in the Heavenly Light skill tree of the Mage class.

Skill Description: Heal the wounds for simply by casting a spell. The target's HP is healed for x instantly.
Required job: First Job
Required points: 15 points in Heavenly Light
Is requirement for: Instant Intermediate Healing
Skill type: Support Skill
Attribute: Light
Cool time: 15 seconds
MP Usage: 12 MP
Target: Any Player
LevelHP Recovered
1 630
2 ?
3 ?
4 945
5 1050

Instant heals are always nice, and this is no exception. With the cost of MP pots so low, this is arguably better than just using normal heals.