

Q1: If a text says "XX card with AA or BB," does that mean AA and BB both have to be XX?
Yes, both have to be XX. For example, "1 level 4 or lower Digimon card with the CS trait or that is yellow or black" means either "1 level 4 or lower Digimon card with the CS trait" or "1 level 4 or lower Digimon card that is yellow or black." In both cases, the card must be level 4 or lower.
Lv.5 Crowmon BT26-076 R Ultimate | Vaccine | Mysterious Bird/DATA SQUAD [When Digivolving] Delete 1 of your opponent's level 4 or lower Digimon. Then, by trashing the bottom face-down card from under any of your Tamers, they trash 1 card in their hand. [Your Turn] [Once Per Turn] When your opponent's hand is trashed from or effects trash cards from under your Tamers, this Digimon may digivolve into [Ravemon] or a [DATA SQUAD] trait Digimon card in the trash with the cost reduced by 1. --- [On Deletion] You may play 1 play cost 5 or lower card with [Avian] or [Bird] in any of its traits or the [DATA SQUAD] trait from your trash without paying the cost.
Lv.5 Crowmon BT26-076 R Ultimate | Vaccine | Mysterious Bird/DATA SQUAD [Digivolve] Lv.4 w/[DATA SQUAD] trait: Cost 3 [When Digivolving] Delete 1 of your opponent's level 4 or lower Digimon. Then, by trashing the bottom face-down card from under any of your Tamers, they trash 1 card in their hand. [Your Turn] [Once Per Turn] When your opponent's hand is trashed from or effects trash cards from under your Tamers, this Digimon may digivolve into [Ravemon] or a [DATA SQUAD] trait Digimon card in the trash with the cost reduced by 1. --- [On Deletion] You may play 1 play cost 5 or lower card with [Avian] or [Bird] in any of its traits or the [DATA SQUAD] trait from your trash without paying the cost.
Lv.5 Crowmon BT26-076 R ultimate | Vaccine | Mysterious Bird/DATA SQUAD [Digivolve] Lv.4 w/[DATA SQUAD] trait: Cost 3 [When Digivolving] Delete 1 of your opponent's level 4 or lower Digimon. Then, by trashing the bottom face-down card from under any of your Tamers, they trash 1 card in their hand. [Your Turn] [Once Per Turn] When your opponent's hand is trashed from or effects trash cards from under your Tamers, this Digimon may digivolve into [Ravemon] or a [DATA SQUAD] trait Digimon card in the trash with the cost reduced by 1. --- [On Deletion] You may play 1 play cost 5 or lower card with [Avian] or [Bird] in any of its traits or the [DATA SQUAD] trait from your trash without paying the cost.
Lv.5 ヤタガラモン BT26-076 R 完全体 | ワクチン種 | 妖鳥型/セイバーズ 【進化時】Lv.4以下の相手のデジモン1体を消滅させる。その後、自分のテイマーの下にある裏向きのカードを下から1枚破棄することで、相手は自身の手札1枚を破棄する。 【自分のターン】[ターン1回]相手の手札が破棄されたときか、自分のテイマーの下のカードが効果で破棄されたとき、このデジモンをトラッシュの「レイヴモン」か特徴「セイバーズ」を持つデジモンカードに支払うコスト-1で進化できる。 --- 【消滅時】自分のトラッシュから、登場コスト5以下の、特徴に「鳥」を含むか特徴「セイバーズ」を持つカード1枚をコストを支払わず登場できる。