I've also seen people write on basic lands to note the card (though this isn't allowed in tournaments)
Anyway, Sinkholes ability to disrupt peoples mana before they can really even get their game going is good enough for Legacy and would be seriously problematic if the card was ever legal in Modern, let alone Standard
Other Prototype Notes: A prototype card is a colorless card in every zone except the stack or the battlefield, as well as while on the stack or the battlefield if not cast as a prototyped spell
Each standard-legal set since Ikoria (except Core 2021 ) features 2-5 Commander decks, as the Commander format has become one of the most popular ways to play Magic, releasing preconstructed commander decks with every set allows for the creation of cards unique to the format that are thematically tied to the setting of their respective expansion, as well as giving more options to new players who want to try Commander
Each Collector Booster contains 15 Magic: The Gathering cards and 1 traditional foil double-sided token, with 2 Foil-Etched cards and 10 Traditional Foil cards in every pack
