The OG duals were so powerful they served as the reason for subsequent land cycles adding restrictions such as coming into play tapped or dealing damage when tapped for colored mana
smpratte: Early on I tried to buy doubles of every card I sold, even Pikachu Illustrators
Our options are therefore as follows: Azorius v Jund: Will, Scion of Peace & Ikra Shidiqi, the Usurper + Kediss, Emberclaw Familiar Rakdos v Bant: Judith, Carnage Connoisseur & Shanna, Purifying Blade Selesnya v Grixis: Trelasarra, Moon Dancer & Solkanar the Swamp King Boros v Sultai: Firesong and Sunspeaker & Zimone and Dina Golgari v Jeskai: Beledros Witherbloom & The Archimandrite Okay, there should be six, but if you can find an oppositional pair in Dimir and Naya that can both be reasonably called a life gain deck, go for it
Now just one more thing: your feedback guys
There will be some times when you need to cast your Nullify on turn two on absolutely anything your opponent plays, just to avoid falling behind