Mono blue poison counters (no combat) could be a thing with all the proliferate and free poison counters stacked into spells… would it win.. not consistently, but it could : r/Pauper
Commander 2020 - Free Spells and Early Picks
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blue-counter - Card Kingdom Blog
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Top 30 Instant Counterspells in "Magic: The Gathering" (MTG) - HobbyLark
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What Do You Mean Blue is Unfair? You Have Counterspells Too!
Negate · Dominaria United (DMU) #58 · Scryfall Magic: The Gathering Search
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Amazon.com: Izzet Counter/Burn Deck - Blue Red - Modern Legal - Custom Built - Magic The Gathering - MTG - 60 Card : Toys & Games