Q1: What are the specific <Overflow X> rules for this card?
This card is always an inherent rule with trait: type "aquatic type".
Lv.4 Shellmon BT19-019 C Champion | Data | Mollusk/LIBERATOR [When Digivolving] If you have 1 or fewer Tamers, you may play 1 [Yao Qinglan] from your hand without paying the cost. (Rule) Trait: Has [Aquatic] Type. --- Inherited: [End of Attack] [Once Per Turn] Gain 1 memory.
Lv.4 Shellmon BT19-019 C Champion | Data | Mollusk/LIBERATOR [When Digivolving] If you have 1 or fewer Tamers, you may play 1 [Yao Qinglan] from your hand without paying the cost. (Rule) Trait: Has [Aquatic] Type. --- Inherited: [End of Attack] [Once Per Turn] Gain 1 memory.
Lv.4 Shellmon BT19-019 C Champion | Data | Mollusk/LIBERATOR [When Digivolving] If you have 1 or fewer Tamers, you may play 1 [Yao Qinglan] from your hand without paying the cost. (Rule) Trait: Has [Aquatic] type. --- Inherited: [End of Attack] [Once Per Turn] Gain 1 memory.
Lv.4 シェルモン BT19-019 C 成熟期 | データ種 | 軟体型/リベレイター 【進化時】自分のテイマーが1体以下なら、自分の手札から、「姚青嵐」1枚をコストを支払わずに登場できる。 〈ルール〉特徴:タイプ「水棲型」を持つ。 --- Inherited: 【アタック終了時】[ターンに1回]メモリー+1。