To prevent scalping of first-edition cards, it is impossible to tell if a card is a reprint, unless it has been errata'd and had its text changed between printings
"Oversize cards" is not a "set" by the usual Magic definition, but I'd guess your online store categorizes them that way to make it clearer to customers they're buying an abnormal card
Starter Kit 2x Decks Code | Final Fantasy $5.95 Reward Buy this listing to receive x1 Digital MTG Arena Code instantly to the browser and your registered email address
However, there may be better removal options available depending on the specific strategy of the deck, such as cards with additional utility or flexibility
It uses the new Blood mechanic that doesn't have years of support behind it, and it's only got one infinite combo that doesn't inherently win the game on its own
Its high price point, averaging $35, reflects its value in bolstering pre-existing decks