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

Can I use this card to digivolve into a Digimon card with a special digivolution costing 3 or less?
Yes, you can.
Ruled Mar 28, 2024
Can I use this card to DNA Digivolve into a Digimon card with a DNA Digivolution costing 3 or less?
No. The effect reads “You may digivolve 1 of your Digimon,” so you can’t use it to DNA Digivolve.
Ruled Mar 28, 2024
Can I use this card to digivolve one of my Tamers into a Digimon that can digivolve from Tamers?
No. The effect reads “You may digivolve 1 of your Digimon,” so you can’t use it to digivolve a Tamer.
Ruled Mar 28, 2024
Can I ignore digivolution requirements when digivolving by the effect of this card, as long as the cost is 3 or less?
No, this card's effect does not allow ignoring digivolution requirements, so you can't ignore digivolution requirements unless some other effect that permits you to do so.
Ruled Mar 28, 2024
I have a card in my hand with an effect that reads “1 of your Digimon may digivolve into this card in your hand for a digivolution cost of 3.” Can I use this card’ to digivolve into it?
Yes, you can.
Ruled Mar 28, 2024
Can I activate effects that reduce digivolution costs like or [EX1-071]/[Win Rate: 60%!] to reduce the digivolution cost of a card in my hand from 4 or more to 3 or less, and then use this card to digivolve into it?
No, those effects are only active when the digivolution is taking place, which means they reduce the digivolution cost after a player has announced a digivolution. As such, at the time this card's effect is activated, the digivolution cost hasn't been reduced, and you can't choose the card with this card’s effect.
Ruled Mar 28, 2024
I have a Digimon card with multiple digivolution requirements: one with a digivolution cost of 3, and one with a digivolution cost of 4. Can I use this card to digivolve into that Digimon card and apply the requirement with a cost of 4?
No. Even if the card has a digivolution requirement with a cost of 3, if you want to digivolve off the requirement with a cost of 4, you can’t use this card to digivolve.
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.