DOUBLE, TRIPLE
Double Allows you to cast a Magic twice on one ally. Diamonds [pink] appears at four corners on the character and the word "DOUBLE" is seen.
Double in Action
Triple Allows you to cast a Magic triple on one ally. Diamonds [yellow-green] appears at the four corners of the character and the word "TRIPLE" is seen.
Facts
A very useful spell. Double allows you to cast a spell twice in a row. Think about the damage caused if you use Ultima. Triple is even much better as it will cause you to cast a spell thrice in a row. Think of the Area Heal in Brigandine! Sorry about the misleading information. I myself personally think that this spell is used to replaced the All Materia combo in FF7. But unfortunately, only a few monsters have them. It works better if you have acquired Triple Consumption or Double Consumption.