These cards are more suitable for the binder than the deck box, but nothing is stopping you from throwing these cards into action
The thing the serpents are fighting with on both faces of the card is the foot of a Phyrexian which is obviously significantly larger
After-Market Proxies & WCD/CE/IE cards policy We believe its against the spirit of what our proxy policy stands for to allow the usage of third party proxy print companies that illegally use and sell WotC intellectual property
If you didn't have an answer for your opponent's common, you were effectively dead
You can even use Tetsuko Umezawa, Fugitive to make your whole board unblockable
Quite appropriately, several characters from the Madrigal family were also expanded to 4 copies, removing characters that didn't have much to do with the strategy, such as Madam Mim - Up to No Good or Ryder - Fleet-Footed Infiltrator