Oritsuru » Final Fantasy X-2 » Dress Spheres » Black Mage
Though rather lacking in the physical strength and defense department, a black mage totally makes up for it in the category of magic. Causing massive elemental damage to enemies, this dress sphere could possibly become one of the primary damage providers in battle! Find a monster who avoids physical attacks and is weak to a particular element? No problem! Have the resident BM blast them away in mere seconds!
Only drawback of a Black Mage is that MP consumption is high. However, the massive amounts of MP the typical black mage has should make it of little concern to you.
The black mage dress sphere is automatically found after the Mt. Gagazet Mission. An example of a Black Mage is Lulu from FFX.