Your opponents wont be attacking or removing it from play in fear of what can come after, be it Omniscience, Cacophony Unleashed, Battle at the Helvault, or what have you
The first time that a land enters the battlefield under an opponents control outside of normal land plays, youre able to search for any plains card and put it onto the battlefield tapped
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Songs and actions like A Whole New World refill your hand and set up combos, while disruption cards make sure your rival never feels safe
That happens on your main phase, but that is not that relevant
Historically, unfair decks abused mana better than fair decks whether that be Storm, Amulet Titan or Krark-Clan Ironworks