Commander Qty: 1 Price: $3.99 Minsc & Boo, Timeless Heroes When Minsc & Boo enters and at the beginning of your upkeep, you may create Boo, a legendary 1/1 red Hamster creature token with trample and haste
There are now different kinds of cards split similar to these, and some of the rules have changed since the original question was asked
Nonetheless, the thing with all the top decks of this era, like The Lost Zone Toolbox, Mew VMAX, or Urshifu Rapid Strike VMAX, is that they are very complicated and situational
Similarly, Fusilier combined with Metamorphosis can cheat King Dragun into play, who can then special summon Armed Dragon LV5
In the absence of cards like [casthaven]Stifle[/casthaven], [casthaven]Wasteland[/casthaven], [casthaven]Force of Will[/casthaven], and dedicated hosers, I have no idea how Modern decks can fight them, other than by playing a version of Eldrazi designed to break the mirror (or perhaps [casthaven]Painters Servant[/casthaven] is a stronger hoser than it appears)