This is from the original test decks in 2013, it is flimsy compared to regular cards.
Ally of the Black Moon // Eternal Vampire, Mikage Seijuro - Promo Cards (Prize) (Metal) (Clear)
$100.00
Mercurius, Wizard of the Water Star // Mercurius, Dark Commander of Ice - Promo Cards (Prize) (Metal) (Silver)
Sold Out
Charlotte, Determined Girl // Charlotte, the Mage of Sacred Spirit - Promo Cards (Prize) (Metal) (Clear)
$100.00