Anathemancer punishes them severely for this with a deadly early creature and the promise of a much bigger hit later down the lineone that can't profitably be countered and can't be stopped with discard, which will force many control decks to consider alternate means of dealing with the problem such as an Identity Crisis
You eventually get far more creatures, mana, cards, and life than your opponents, and you can close things out with cards like Lathiel, the Bounteous Dawn, Nykthos Paragon and Blossoming Bogbeast
This shapeshifter sees a huge amount of play in Commander, allowing you to copy a powerful artifact like Bolas's Citadel, an equipment, or even a commander with a good ETB effect
On top of that, it has trample, which is something these kinds of creatures need because theyre regularly stopped by chump blockers
Green creatures like Hookhand Mariner are also good defenders to mix into your curve