The downside of this card is that its only a temporary solution, but depending on how big the advantage is, stealing it may win you the game anyway
Like for the commons, you get sequences of cards in packs, but since they are only 3 (or 2) cards long, it is generally not possible to reconstruct the sheet as there are usually mulpiple repeated sequences of 2 which means there are multiple possible reconstructions of the sheet
You pay one life, sacrifice an undying creature to Yawgmoth, then put the -1/-1 counter on the other undying creature, so you can sacrifice it and it will come back
But counterfeiters are always looking for loopholes, and the circulation of fake trading cards is a real danger to not just the industry revenue, but also the integrity of collectibles
Selling Your Bulk Look online to find a gaming or card shop in your area