That activated ability can be absolutely criminal, whether you use it to finish someone off or just to bring them down a peg
While she wont always double treasure production, many cards like Parallel Lives that are known for doubling creature tokens will also double treasure tokens, so a lot of popular token support is still open when deckbuilding
3 Realm Seekers In a very real way, this could have been the pseudo-replacement for Primeval Titan or Sylvan Primordial in your decks and hearts
I've even played Maze's End in Modern, which is fun but still fruitless (By the way, Wizards, Maze's End in War of the Spark or we riot, and no I don't care about the Vorthos flavor complaints
If The Grand Caluctron in on the battlefield and my X is in my opponent's hand, can I cast cards in their program