Firaja

Fire 4 or Firaja is often a spell that appears in certain instalments of the series the spell is availible to the Heroes or is often a enemy spell,the spell causes heavy fire damage to enemies.

Final Fantasy Tactics
Firaja is a spell availible to Wizards it costs 700 JP to learn it is causes a massive amount of Fire damage.

Final Fantasy XII
Firaja is a spell exclusive only to the esper Belias it causes Fire damage and Oil status to the whole party.The Quickening special attack Inferno has the same spell animation as Firaja and the spell Ardor can be counted for a fourth fire spell.

Revenant Wings
Firaja is a spell exclusive only to the esper Belias it causes Heavy Fire damage to all enemies in the area of the spell.