Welcome to the Tower of Zot!"Cindy
Cindy is a boss in Final Fantasy IV. Cindy, Sandy, and Mindy are the Magus Sisters, servants of the wind boss Barbariccia. They attack Cecil and the party on the fifth floor in the Tower of Zot just after a room with a save point.
The Magus Sisters use Delta Attack, in which Sandy casts Reflect on Cindy, and Mindy uses a level two spell or Bio on her, reflecting it on to Cecil's party. Cindy revives her allies if they die, so it is recommended that she be the first target unless one wants to grind by having her revive Sandy and Mindy repeatedly.
One strategy is to kill Sandy first while Cecil or Tellah heal. After defeating Sandy, Tellah should use Dispel on Cindy, then use an -"aga" spell on Cindy. Cecil should cover Tellah. Cindy should be defeated before she uses Reraise. After defeating Cindy, Mindy will cast Bio and a -"ra" spell on herself.
As Cindy revives Sandy and Mindy after two consecutive turns, it is possible to rack up EXP and gil from this single battle. When Sandy/Mindy is killed, and then resurrected by Cindy, the earned EXP and gil accumulates. It is also wise to heal Cindy to prevent her from dying. This is a quick way to level up Cecil if he is only member left alive. In the SNES version the party members, such as Rydia, Rosa, and Kain, will be leveled up to Cecil's level.