[When Attacking][Once Per Turn] You may add the top card of your security stack to your hand to unsuspend this Digimon and have 1 of your opponent's Digimon get -6000 DP for the turn.
Rulings Q&A — 3 entries
Q1Q1209
Do I always have to activate this card's effect when I attack?
I attack with this Digimon, then activate its [When Attacking] effect to unsuspend it and give 1 of my opponent's Digimon -6000 DP. If I attack again on the same turn, can I give 1 of my opponent's Digimon an additional -6000 DP?
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Official Ruling
No. The effect has [Once Per Turn], so it doesn't activate on any attacks past the first one.