There are 2 achievements related to blue magic:

• Learning- Elementary: Learned 10 kinds of blue magic techniques.
• Learning- Genius: Learned all kinds of blue magic techniques.

Basically, Blue Mage is a type of mage who can learn magic spells from monsters. To learn the spells, the Blue Mage (or someone with the Learn ability) has to get hit by the blue magic spell cast by monsters. Easy, right? Not quite. There are spells that only hit with a specific condition (spell names that start with the word "Level"), then there are support spells that require the Control ability to force the monsters to cast on your Blue Mage.

For example, the "Level 5 Death" spell will target your allies whose level can be divided by 5. If everyone is level 35, then everyone will get hit by the spell because 35 can be divided by 5. Another example is "Level 3 Flare"; the "Flare" will hit whoever's level is divisible by 3 (33, 36, 60, etc.).

Learning Blue Magic Strategy

• Make a Quicksave.
• Set everyone's ability to Learn (or change everyone's job to Blue Mage).
• Kill all monsters but the one we want to learn the spell from.
• Defend until it casts the spell on one of your allies.
• Restart from the Quicksave if you die.
• After you learn the spell, you can change everyone's abilities/jobs back to whatever your setup is.

Learn Ability

Learn ability is unlocked when your Blue Mage reaches level 2, which equates to 30 battles assuming you get 1 ability point (ABP) per battle. I highly recommend you set your entire party as Blue Mages until they all learn the Learn ability. This way, you can keep your current job lineup when grinding for blue magic.

Blue Magic

Let's start with our first 2 blue magic spells.

Blue Magic (1/30): Goblin Punch
From Monster: Black Goblin
Location: Wind Shrine 2F
Go back inside the Wind Shrine 2F, then run around until you encounter Black Goblin and use the strategy above.