SWALLOWED BY LEVIATHAN I am a big, big fan of countermagic the counters anything, even if the opponent can pay a cost to not have their thing countered
Creating treasure tokens simply by casting instants and sorceries is a different take on cost reduction, offering you a rebate instead of outright lowering the cost
There is an alternate cost if you control a Swamp, allowing you to pay four life instead of three generic and one black
All of the above steps should set you up to import any deck you need to in Magic: The Gathering
Modern Horizons 3: Nadu, Winged Wisdom Runner-Up: Psychic Frog While Psychic Frog has had the most reach across multiple formats (seeing play in Modern, Legacy, and even Vintage), it's impossible to give the title of best card from Modern Horizons 3 to Nadu, Winged Wisdom
Secret SalvageSecret Salvage (7,807 Inclusions, 0% of 1,833,069 Decks) As good as red has looked this whole time, it's hard to argue with a card that essentially says "draw a third of your deck" on it