SF T-tar Vs. SF Sceptile

[Naki Feralkin]

Does Energy Trans activate just one time and all grass energy moved goes on throughout the turn, or does it activate once per moved Grass energy?

Asking because the text on Energy Trans is vague and I would assume Tyranitar wouldn't get like a hundred darkness energy off of it.

 

[PokePop]

"As often as you like... move a :grass: energy card"

So each use of the power is moving one energy card.
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Tyranitar would love you to move lots of energy.