I need 1 for Zell’s Ehrgiez

but I’m past where Galbadia attack FH.
And I don’t have the rare Item skill.

Well, you can battle Adamantoise enemies on the shore around Galbadia Garden. Or refine the Sacred card into 10 of them. It’s your call.

Do you mug them or do admatoises drop them?

I’m pretty sure they drop them. But Mug a Whisper just for the fun of it.

Just refine the card. I never used it anyways.