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CGC Trading Cards has graded some of the rarest sets and cards the franchise has ever printed, said Matt Quinn, CGC Trading Cards Senior Grading Finalizer

I think those are super classy

If you find a way to damage your opponent, either through combat damage or with a damage spell (such as [c]Lightning Bolt[/c]), you can play this spell for only one red mana, which is quite the bargain

You can tap Rosheen to add four generic mana to your mana pool, though you can only use it on spells and abilities with X in the cost

While that would have been cute for a regular EX, its extremely risky for a Mega Evolution, losing which instantly ends the game with you on the losing side