It could cost just like the Pikachu & Zekrom GX Premium Collection, $120 AUD (which is converted $87,78 USD)

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Only one Supporter card can be played per turn, but Cassiopeia has an extra requirement too
Pixie Guide is another card alongside Barbarian Class that can help to ensure the odds are ever in your favor
Im going to rule that this is a break until such a time that WotC actually makes a set that lets white permanently change the colors of other permanents
If you load up on creature spells, then it allowing everyone to draw cards except for a player playing a noncreature spell becomes less of an issue