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Its also a nice source of colorless mana

Those Crystals are the e-Series heirs to the Shining Pokmon of the Neo era, each carrying the Crystal Type Pok-BODY that lets the card shift its type depending on the Energy you attach

See also: Binder layout planner What are the Special Illustration Rares (SIRs) in Mega Evolution? Mega Evolution has 10 Special Illustration Rares: Mega Venusaur ex (177/132), Mega Gardevoir ex (178/132), Mega Lucario ex (179/132), Mega Absol ex (180/132), Mega Latias ex (181/132), Mega Kangaskhan ex (182/132), Acerolas Mischief (183/132), Lillies Determination (184/132), Lt Surges Bargain (185/132), Wallys Compassion (186/132)

Yes, you can as long as that spell can normally be cast at instant speed

What text box is it, what does it say