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

Do I choose 1 Digimon with the lowest play cost or 1 Tamer with the lowest play cost to delete for "among your opponent's Digimon and Tamers, delete 1 with the lowest play cost" in this card's <When Attacking> effect?
No. You delete the one with the lowest play cost from among your opponent's Digimon and Tamers. If multiple Digimon and/or Tamers have the lowest play cost, the player of this card chooses from among them.
Ruled Mar 28, 2024
I used this card's <When Attacking> effect to trash 2 level 6 or higher digivolution cards. If my opponent has 1 Digimon with a play cost of 3 and 1 Digimon with a play cost of 4, can I delete both of them?
Yes, you can. For every level 6 or higher digivolution card trashed, this effect deletes 1 of your opponent's Digimon or Tamers in order starting with the lowest play cost.
Ruled Mar 28, 2024
If I use this card's <When Attacking> effect to trash 3 level 6 or higher digivolution cards, do I trash the top 2 cards of my opponent's security stack after deleting 3 of their Digimon and/or Tamers with the lowest play costs?
Yes, that's correct.
Ruled Mar 28, 2024
Can I use this card’s <When Digivolving> effect to choose 0 for the play cost total without deleting an opponent's Digimon?
No, you can't. This effect requires you to choose at least 1 of your opponent's Digimon with a play cost of 6 or less whenever possible.
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.