How spell learning actually works

1. The three requirements

Every learn, everywhere, needs the same three things:

1. The cast completes. Interrupted casts don't count. For instant casts, watch the battle log.
2. You tag the enemy. One hit or one debuff before it dies. An untagged kill teaches you nothing.
3. You are alive at the kill. Dead when it drops means no learn. Raised in time counts. This is what makes Self-destruct and Final Sting sources tricky: survive your own spell.

You do not need to be hit by the spell. Standing in the AoE out of solidarity accomplishes nothing.

2. The sync rule

Run an instanced duty with level sync on and every spell witnessed there is a guaranteed learn. That's the whole trick behind "synced runs guarantee it" on the spell pages. Two traps: the Unrestricted Party option silently turns sync off, so re-enable Level Sync in the same menu if you want the guarantee; and the minimum item level setting is irrelevant either way. The guarantee covers dungeons, trials, and raids. It does not cover the Masked Carnivale, FATEs, or the open world.

3. Unsynced odds

Square Enix has never published rates. Community estimates put 1-star spells around a coin flip per witnessed cast and 5-star spells down near 5%, with older estimates running more generous. Treat every number you read as folklore with error bars. The practical version: unsynced farming works, higher-rank spells take more laps, and a synced run ends the argument.

4. The party roll

The game rolls once for the whole party. If any Blue Mage learns, every eligible Blue Mage learns with them: eligible meaning they saw the cast, the party tagged the enemy, and they're alive at the kill. Farming in a BLU party is strictly better than farming alone, and a dead party member gets nothing, which is why someone always angrily re-queues.

5. The guaranteed paths

Not everything is a hunt. Three routes hand you spells outright:

1. Job quests. Mind Blast comes with the level 20 quest and Glower with the level 50 quest. Both 100%, even unsynced.
2. Whalaqee totems. Thirteen spells sit with Wayward Gaheel Ja in Ul'dah (X:12.5 Y:12.9), free, gated behind achievements: spell counts (5, 10, 20, 50, 100, 120), Carnivale progress, and Blue Mage levels 70 and 80. No notification when one unlocks, so check back.
3. Carnivale milestones. Clearing 10, 20, and 30 stages hands you Moon Flute, Doom, and Angel Whisper.

Per-spell sources, coordinates, and odds live in the Spellbook.

6. Myths worth killing

• "You have to get hit by it." False. Witnessing the completed cast is the whole requirement.
• "Some spells are Carnivale-only." None are. Basic Instinct is for soloing multi-player duties, not a Carnivale exclusive. Carnivale learns roll RNG like any unsynced content.
• "FATEs can't teach spells." They can, at unsynced rates. What FATEs lack is the leveling bonus, not the learn.