This card is a sideboard staple for decks that want to deal with specific threats like Karn, the Great Creator or Urza's Saga, and its flexible enough to fit almost anywhere
Some decks can be built around the cascade mechanic, as there are ways like Yidris, Maelstrom Wielder to give expensive spells (like the ones with landcycling) cascade
That constant stream of tokens adds both defense and offense, especially when paired with incremental mill effects like Altar of the Brood
Court of Grace In a vacuum, Court of Grace is a fantastic card
It generates its own energy if you need to scale up towards destroying more expensive permanents, but you can also just fire this off for and X=0 to clean up 0-mana clutter on the board
The fact that some decks play these lands because they rarely want or need to hit their fourth land drop is an entirely other dimension