It's certainly a powerful spell if you have other ways of dealing your opponents mill, or as I like to call it, "deck damage." You can pair this with cards like Deadly Cover-Up and Space-Time Anomaly, assuming you can survive to those turns in the game
Relic of Progenitus has been one of the premium answers to some strategies: Its cheap, and can play a grindy game removing one card per turn, or one-shot-exiling both graveyards at the right time
There's also a list called the Game Changers list you'll find below that the brackets reference
If you are reading a card file or spoiler list, and you read that title, what would you expect to see follow
Feathered Fun: The Chocobo Bundle Chocobos are back and brighter than ever
After your second spell, you get a chance to play whatever's on the top of your library and after your third, Stella can copy an instant or sorcery for you