If you want one for your collection as an historical trinket, I recommend reaching out to Keith Adams on facebook or similar and he can probably hook you up
Mutagen tokens may not be the most potent artifact token out there, but an extra buff at the players discretion can swing the direction of a game quickly
1 generic, 2 Phyrexian white, Sacrifice two other artifacts and/or creatures: Put an indestructible counter on Mondrak, Glory Dominus
It starts out with some light hand disruption, and then you only have to hit it for three damage to access a powerful anthem that will keep pumping your creatures if they attack
Here are some other useful measurements to know about Tall / Tarot Card: Tarot card size mm: 70 x 120mm Required bleed: 2mm along each edge Recommended margin: 5mm Rounded corner size: 6mm Large Playing Card Dimensions The largest of our pre-set sizes, this type of playing card has been creatively named The Large Playing Card
Supposedly the Beyond Booster was supposed to mirror the Aftermath Boosters from March of the Machine