If you want to go big, cards like Doubling Season, Vorel of the Hull Clade, Winding Constrictor, and Deepglow Skate can double or even explode the number of counters, making your payoff cards hit game-ending levels in just a turn or two
Killing the Elf on turn 1 really slows them down, they have a hard time keeping a reasonable board and even if they resolve Winota, Joiner of Forces with a couple of attackers, we have the one mana answer for it before combat
Stunning 2009 Pokmon Diamond & Pearl Promo Holo Charizard G LV #DP45 PSA 10 and 2008 Pokmon Diamond & Pearl Stormfront Holo Charizard #103 PSA 10 were also showstoppers
It's not universal, but it's an excellent 7 synchro
Meanwhile it's been a good week to be an Eldrazi with a bunch of older tribe members seeing meaningful price increases thanks to all of the new support from Modern Horizons 3
Not only does it negate, but it also forces your opponent to attack into a Blue-Eyes, which may not always be the most optimal strategy for them