Even if it doesnt, youll likely leave them with so little life that a single burn spell or Haste creature can finish them off on turn four
While I do think part of the push to unban Twin is generally nostalgia for the yesteryears of Modern and part of it is that the reasoning for banning Splinter Twin in the first place was extremely lacking, I also think that the meme is at least correct enough that we should give it a try
This plays into Marchesa's passive that brings any creature dying with a +1/+1 counter back
3 Mewtwo Ex A Powerful And Consistent Attack While Mewtwo ex has a similar strategy to Charizard ex, it is even better because the Energy acceleration happens on the Bench as opposed to needing to be in the Active Spot
But if players are dead-set on him, including tons of enter-the-battlefield effects like Warstorm Surge is a good way to make use of his hefty 5 power, alongside instant-speed kill spells to trigger his returning effect
Or you could play Ulvenwald Tracker and repeatedly start fights with your opponent
