2022-10-14 Activating a card's unearth ability isn't the same as casting that card
If something causes Urzas Saga to lose its chapter abilities without removing the saga subtype, it will be immediately sacrificed as a state-based action because it has no more chapters that need to resolve
STEM links : Analyze Pokmon stats with spreadsheets or explore biology via real-life Pokmon (octopuses = Octillery, anyone?)
One of my favorite bits of Final Fantasy is the tiered magic system - and Wizards of the Coast figured out a novel way to do it in Magic: The Gathering Cure, Cura, Curaga
As mentioned, U-Turn Board and Air Balloon are perfect for a card like this
Against Affinity, Kataki, War's Wage can be just as good as Stony Silence, making it really hard for the opponent to execute their game plan