I attack my opponent with a Digimon that has this card in its digivolution cards. If they block it with one of their Digimon, does this card's effect activate?

Yes, it does. ＜When Attacking＞ effects activate before your opponent gets to activate ＜Blocker＞.

Biyomon rulings (EX1-002)

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

Inherited effect: [When Attacking] [Once Per Turn] When this Digimon attacks a player, Draw 1

Official Q&A

I attack my opponent with a Digimon that has this card in its digivolution cards. If they block it with one of their Digimon, does this card's effect activate?
Yes, it does. ＜When Attacking＞ effects activate before your opponent gets to activate ＜Blocker＞.
Ruled Mar 28, 2024

Got a line that uses Biyomon? Map it in the builder and share it with a link.

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.

Biyomon rulings (EX1-002)

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

Inherited effect: [When Attacking] [Once Per Turn] When this Digimon attacks a player, Draw 1

Official Q&A

I attack my opponent with a Digimon that has this card in its digivolution cards. If they block it with one of their Digimon, does this card's effect activate?
Yes, it does. ＜When Attacking＞ effects activate before your opponent gets to activate ＜Blocker＞.
Ruled Mar 28, 2024

Got a line that uses Biyomon? Map it in the builder and share it with a link.