If all Mirror Galleries leave the battlefield, the "Legend rule" will apply the next time state-based actions are performed.
But theyre also all in new treatments, mainly the Scrolls of Middle-earth one
A GEM - MT10 copy of the card sold for $10,101 (7,879) on Ebay in January early this year and a NM 7 graded copy of the card will earn you a fraction of this amount at 293
The flexibility of giving myriad to any of your nonlegendaries turns into a ton of value when you make multiples of Prosperous Bandit or Unstoppable Slasher, and those are just the a couple on-curve creatures
This blue, black, and red deck is called a Group Slug deck, a twist on the traditional group hug archetype
This way, a Temple Garden with a Blood Moon out will not have the Forest and Plains types, but will have the Mountain type, which will leave it with one mana ability to tap for red mana