Their main appeal is giving countermagic to red, but 1 mana to destroy something like Hullbreaker Horror is great, too
And then theres also the popular removals on a stick with creatures like Force of Vigor, Masked Vandal or Tranquil Frillback
Zhalfir has replaced Mirrodin/New Phyrexia, and it's lit by Mirrodin's five suns, which makes it a land of endless day
In practice, this meant games were essentially a race to Lin Sivvi, and whoever would play their copy first would lock their opponent out of playing their Lin Sivvi, which allowed the first player to tutor up a bunch of Rebels and win the game
Here's where The Mycosynth Gardens comes into play
According to Bank of America, this is how they actually see Hasbro stock moving in the future, and it all basically comes down to Magic the Gathering