Question:
Can I activate "Crystal Abundance" while "Macro Cosmos" is f ace-up on my opponent's side of the field?
Answer:
You cannot, because you cannot send the 4 Crystal Beasts from your Spell and Trap Card Zone to the Graveyard to pay the cost.
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Curtis Schultz
Official UDE Rules Dude
CurtisSchultz_Netrep@Hotmail.com