I currently have my own [Agumon] and two copies of this card in the battle area.I digivolve the [Agumon] into [Greymon]. At this time, can I activate the first copy of this card's [Your Turn] effect to play [Gabumon] and then activate the second copy of this card's [Your Turn] effect afterwards?
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No.The moment you activate the first copy of this card's [Your Turn] effect, you no longer have one or fewer Digimon, therefore the second copy's effect can't be activated.
Source: EX13-067 Nokia Shiramine