Because of this, it is possible to defeat "Millennium" players by using various stall monsters with an effect that can stop the player from attacking, such as "Battle Fader" or "Swift Scarecrow", in order for them to be weakened enough by "Exodia's" maintenance cost that they will be forced to removing it or risk losing from self-inflicted damage.
Backing up Valley Mightcaller is Three Tree Scribe, which is basically Dour Port-Mage except, rather than drawing us a card when a creature leaves the battlefield without dying, it puts a +1/+1 counter on one of our creatures, giving us another way to grow a massive, game-ending threat as we blink and bounce our board
On the flipside you would need to mark regular and legendary pokemon, and all the items (pokeballs and others alike)
Thousands of players have been double-sleeving their most expensive cards for years
While it offers versatile removal options, there are more efficient cards like Compulsory Evacuation Device or Torrential Tribute that provide similar effects without the restriction of targeting only EARTH Machine Xyz Monsters