Only 110 cards were printed, so what could be more expensive than that
While you'd think the energy of these rapidly zooming counters would be inspired by Blitzball, an interview with Senior Game Designer, Daniel Holt reveals that it's actually derived from the aesthetic of the Sphere Grid levelling system
Still, to this day Nintendo release prerelease cards that come out before the launch of each set
If you cast a spell for another cost "rather than pay" its mana cost, you can't choose to cast it for any other alternative cost
Note that due to her awkward timing, she cannot bounce something in order to save it from a combat trick or at the end of your turn or something you chump blocked with in order to save it or creature removal
There are a lot of Espers in the series, after all, so to make them all white/blue/black would be hugely restrictive