mtg 2021 core set card list Magic: The Gathering (M21) Collector Booster | 15 Cards Core Set 2021 (M21) gathers iconic cards from MTG’s past and combines them with recent favorites Core Set 2021 Variants |

If a cards ability affects cards in play, this only includes character and item cards currently on the table

"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

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

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

Waste Not Turning discard into an engine is exactly what Waste Not does best

However, there may be better removal options available depending on the specific strategy of the deck, such as cards with additional utility or flexibility