Hey,I still can't get Quistis blue magic,Degenerator.Can anyone help me?I've tried to find the monster named Grendel but can't get the item to let Quistis learn her blue magic,Degenerator.Pls tell me where can I get the item to let Quistis learn her blue magic.Thanks a lot.

The item is called a black hole, and it is dropped by gespers very frequently, not grendels. The Gespers are found in the Centra ruins excavation site (with Laguna) and the Lunatic Pandora Laboratory (with Laguna again).

<font color=red face="comic sans ms">Or if you've already passed both of those points, you can refine 1 Gesper card into 1 Black Hole. Wendigos can also drop Black Holes sometimes at high levels, you can fight these in forests near Dollet, and on the muddy area near Deling City and the Tomb Of The Unknown King. :)