Take Ambush, make it so that it doesnt affect flying creatures, and your opponent can spend one mana to remove first strike
Now, to be clear, we're talking about cheating here, so it is imperative that I state that there are no sideboards in the Commander format
You can also use Befuddle to bounce Madam Mim, Snake back to your hand, allowing you to then bounce a higher-cost character like Merlin, Goat back to your hand with Mim
Forget has some additional utility too
Luckily, these effects are usually mentioned explicitly in their descriptions
To counteract this effect, printers rotate the dots grids by at least 30 to one another to minimize the distracting effects of the Moir (as you can see in the picture below), and this can result in a somewhat more pleasant artefact known as a Rosette, resembling the shape of a rose, formed by the dots