Rulings
Q1: When DNA digivolving into this card and using this card's On Play When Digivolving effect to return 1 of each Digimon card with different levels from my opponent's trash to the top of the deck, can I return a Digi-Egg card to the top of the deck?
No, you can't. You can only return Digimon cards.
Q2: When DNA digivolving into this card and using this card's On Play When Digivolving effect to return 1 of each Digimon card with different levels from my opponent's trash to the top of the deck, can I return a Digimon card without a level to the top of the deck?
No, you can't. You can only return Digimon cards with levels. You can't return a "Lv.-" Digimon card.
Q3: When using this card's On Deletion effect to return Kimeramon and Machinedramon from my trash to the bottom of my deck, can I return Kimeramon and Machinedramon that were in this card's digivolution cards to the bottom of the deck?
Yes. This card's digivolution cards are considered placed in the trash at the same time as deletion, therefore they can be placed at the bottom of the deck.
Q4: Can I use this card's On Deletion effect to return just 1 Kimeramon or 1 Machinedramon from my trash?
No, you can't. A "by doing X" condition can't be met if only some of the required actions are performed. In order for the conditions for this card's On Deletion effect to be met, you must return 1 Kimeramon and 1 Machinedramon.
Data Sources
Lv.7 Millenniummon BT18-019 SR Mega | Virus | Composite [DNA Digivolve] [Kimeramon] + [Machinedramon]: Cost 0 [On Play] [When Digivolving] Delete 1 of your opponent's Digimon. Then, if DNA digivolving, by returning 1 of each Digimon card with different levels from your opponent's trash to the top of the deck, gain 1 memory for each returned card. [On Deletion] By returning 1 [Kimeramon] and 1 [Machinedramon] from your trash to the bottom of the deck, you may play 1 [Millenniummon] from your trash without paying the cost. DigiXros -2: [Kimeramon]×[Machinedramon]
Lv.7 Millenniummon BT18-019 SR Mega | Virus | Composite [DNA Digivolve] [Kimeramon] + [Machinedramon]: Cost 0 [On Play] [When Digivolving] Delete 1 of your opponent's Digimon. Then, if DNA digivolving, by returning 1 of each Digimon card with different levels from your opponent's trash to the top of the deck, gain 1 memory for each returned card. [On Deletion] By returning 1 [Kimeramon] and 1 [Machinedramon] from your trash to the bottom of the deck, you may play 1 [Millenniummon] from your trash without paying the cost. DigiXros -2: [Kimeramon]×[Machinedramon]
Lv.7 Millenniummon BT18-019 SR Mega | Virus | Composite [DNA Digivolve] [Kimeramon]+[Machinedramon]: Cost 0 [On Play] [When Digivolving] Delete 1 of your opponent's Digimon. Then, if DNA digivolving, by returning 1 of each Digimon card with different levels from your opponent's trash to the top of the deck, gain 1 memory for each card returned. [On Deletion] By returning 1 [Kimeramon] and 1 [Machinedramon] from your trash to the bottom of the deck, you may play 1 [Millenniummon] from your trash without paying the cost. DigiXros -2: [Kimeramon]×[Machinedramon]
Lv.7 ミレニアモン BT18-019 SR 究極体 | ウィルス種 | 合成型 〔ジョグレス〕「キメラモン」+「ムゲンドラモン」:コスト0 【登場時】【進化時】相手のデジモン1体を消滅させる。その後、ジョグレス進化していたなら、相手のトラッシュから、Lv.の異なるデジモンカード1枚ずつをデッキの上に戻すことで、戻した1枚ごとに、メモリー+1。 【消滅時】自分のトラッシュから、「キメラモン」と「ムゲンドラモン」1枚ずつをデッキの下に戻すことで、自分のトラッシュから、「ミレニアモン」1枚をコストを支払わずに登場できる。 「キメラモン」×「ムゲンドラモン」