Black can pluck them from you hand, white can make casting spells awkward while the best red or green can do to curtail casting is to attack the mana base
Sadly, the set doesn't include a holographic Charizard card
This shouldn't be such a big problem, though, as Grimlock is definitely best as a commander, where he can be seen by all at any time
Or you could play Ulvenwald Tracker and repeatedly start fights with your opponent
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
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