The first artifact, instant, or sorcery your opponent casts each turn is automatically countered, meaning they essentially need to spend mana and sacrifice other spells just to cast key cards 14 Talrand, Sky Summoner If there's something that Commander players enjoy, it's cards that reward them for doing things that are already part of their strategy
Conversely, early print runs or limited-release promos might remain scarce
But even without poison, even without Elesh Norn, the set will be important to our format for this reason: Proliferate
Its so powerful that nearly any deck that can play it should probably at least consider it
Bello, Bard of the Brambles is a Gruul (red-green) legend from Bloomburrow that encourages players to pack their decks with as many cheap ramp spells and expensive artifacts and enchantments as they can, in large part because of his powerful static ability: during your turn, every 4 cost of greater non-Aura enchantment and non-Equipment artifact becomes an indestructible, hasty 4/4 Elemental creature, ready to smash face