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

This card’s effect reveals 4 cards. If the cards revealed only include a Digimon card with [Greymon]/[Omnimon] or 1 Tamer card with [Tai Kamiya], can I still add a card to my hand?
Yes, as long as either a Digimon card with [Greymon]/[Omnimon] or 1 Tamer card with [Tai Kamiya] is among the cards revealed, you can add it to your hand.
Ruled Mar 28, 2024
This card's effect reveals 4 cards. If both a Digimon card with [Greymon]/[Omnimon] and a Tamer card with [Tai Kamiya] are among the cards revealed, can I choose to only add one of them to my hand, and return the other cards to the bottom of my deck?
No. This card's effect reads “Add 1 Digimon card [...] and 1 Tamer card [...] among them to your hand,” so you must add as many cards to your hand as possible.
Ruled Mar 28, 2024
This card's effect reveals 4 cards. If [BT5-093]/[Tai Kamiya & Matt Ishida], [BT9-084]/[Tai Kamiya & Kari Kamiya], or [P-012 Tai Kamiya (V-Tamer)] is one of the cards revealed, can I add that card to my hand?
Yes, those are Tamer cards with [Tai Kamiya], so you can add one to your hand.
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.