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

If this Digimon has both level 3 and level 4 Digimon cards in its digivolution cards, can I choose to play just 1 of them with this card's <When Attacking> effect?
No. If you choose to play cards with the <When Attacking> effect, you must play as many cards as possible?so if cards of both levels are in the digivolution cards, you can't play just 1 of them.
Ruled Mar 28, 2024
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