what a sato mag?

[ChiGal]

and where can i find one?

[Lord_Ariakas]

You can make them with a female force. You don't need to find anything. Check out the guides.

[Guntz348]

You have to raise it yourself, no cell required. Heres a few guides on how to make one,

http://www.pso-world.com/satoguide.php

http://www.pso-world.com/ep2raremagguide.php