your opponents can only have so much chaff before Azula steals real threats
(A copy of a permanent spell becomes a token.) Enchantment Kindred - Eldrazi Copy (CTRL to add secondary) Creature Dominator Drone Devoid (This card has no color.) Ingest (Whenever this creature deals combat damage to a player, that player exiles the top card of their library.) When this creature enters, if you control another colorless creature, each opponent loses 2 life
Create massive undead monstrosities with Devour for Power, send fearless Giants to crush your foes with Wade into Battle, craft deadly artifact combinations with Built from Scratch, or spawn an inexorably growing army with Breed Lethality
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