[@Desire] But in the OP it says:

[quote] In addition, a rare material called Cortex is used as a powerful supply of energy. It works like a battery. [b]It has the ability to replicate any form of energy[/b], and has it's own unique, powerful energy, and the usable form is kept in crystal shards.[/quote]
And, as Magica is a form of energy, would Cortex not be able to replicate it even if it couldn't shape said energy into a usable form?