Tucking this underneath an Isochron Scepter is an especially dastardly way to win the game: while your foe can play lands and activate abilities, that's about all they can hope to do
Youll pay 4 mana to destroy all creatures on the board, no questions asked, and they cant be regenerated
As well as Fear of Missing Out, Modern Delirium runs cards like Hollow One, Dragon's Rage Channeler, and Nethergoyf - that last one has spiked a little, too, up to $20 from $14.50
Mostly it came down to authors preference: in touching on the graveyard side of things it was him or Shirei
Because fetch lands can retrieve any land that meets one of its land type requirements, that same Arid Mesa can fetch a Steam Vents, which is an island mountain dual land