how to morph 8 eye in battle arena and apply the w-item glitch to obtain 99 magic source per encounter. equip the w-item materia on the character you want to use, also equip the Counter==Morph on connected slots. when you face the 8 eyes, paralyze or sleep one of them, then before the other one attacks you use the one item (potion) in the sample movie, and wait till the 8 eye perform his attack, your character will counter with the morph command and the 8 eye will be morphed to a magic source, the item will end up in the used (potion) place and simply you can do the w-item trick to obtain 99 of them.
How to use w-item glitch to obtain 99 magic source from 8 eye in battle arena