3 official rulings from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

Does this card's effect count this Digimon itself?
Yes, it does. This Digimon counts toward this card's effect.
Ruled Mar 28, 2024
I have 2 Digimon in play. Can I use this card's effect to give -1000 DP each to 2 of my opponent's Digimon?
No, you can't. The effect only targets 1 of your opponent's Digimon.
Ruled Mar 28, 2024
After playing this Digimon, I play another Digimon during the same turn. Since I now have more Digimon in play, can I give my opponent's Digimon an additional -1000 DP?
No, you can't. The <On Play> effect has already finished activating.
Ruled Mar 28, 2024
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Questions and answers are Bandai's official rulings, collected and translated by the DigimonCardGame Wiki community and reused here under CC BY-SA. Card names and card text are © their respective publishers; Combalo is not affiliated with Bandai.