3 official rulings from Bandai, last ruled Apr 4, 2025. Straight answers to how this card actually resolves.

What happens if a Digimon with 10 or fewer cards stacked with it is chosen for this card's <On Play> <When Digivolving> effect?
The top card is trashed until there are no more stacked cards. Once there is 1 card left, it isn't considered to have "stacked cards," therefore no more are trashed.
Ruled Apr 4, 2025
What happens if this card's <On Play> <When Digivolving> effect trashes stacked cards and the Digimon becomes a Digimon without DP?
It's trashed upon the rule check timing. This trashing isn't considered trashing from the battle area.
Ruled Apr 4, 2025
What happens if this card's <On Play> <When Digivolving> effect trashes stacked cards and the Digimon becomes an Option card?
It's trashed upon the rule check timing. This trashing isn't considered trashing from the battle area.
Ruled Apr 4, 2025
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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.