Rulings
Q1: This card is chosen to be deleted by BT5-106 Demonic Disaster, if it uses its All Turns effect to prevent its deletion do I still get to unsuspend a Digimon?
No, you cannot unsuspend a Digimon if this card is not deleted.
Q2: My opponent's Digimon with Piercing attacked my Digimon, and my Digimon lost the battle. I then activate my Digimon's All Turns effect to prevent it from being deleted. What happens to my opponent's Piercing?
As the requirement of "when this Digimon attacks and 'deletes an opponent's Digimon 'and survives the battle" of Piercing was not met, it does not activate.
Q3: My Digimon has Piercing gained from BT8-103 Lightning Blade and battles a Digimon with equal DP. I activate its All Turns effect to prevent it from being deleted. Does Piercing trigger?
Yes, because the Digimon will still have Piercing and it deleted a Digimon battle and survived it will trigger.
Q4: This card has Piercing from EX1-008 MetalGreymon in its digivolution cards, this card attacks a Digimon with equal DP and uses its All Turns effect to prevent its deletion by trashing EX1-008 MetalGreymon. Does Piercing still trigger?
No, it lost Piercing before the timing it would trigger and if it doesn't trigger it cannot activate.
Q5: Does this card perform De-Digivolve 3 on 1 of my opponent's Digimon, or does it perform De-Digivolve 1 3 times on the same Digimon?
It performs De-Digivolve 1 3 times on the same Digimon. So you must do as much as you can.
Q6: If I place 3 cards under this Digimon for its On Play When Digivolving effect and target a Digimon for De-Digivolve that has a Tamer or Option card as its topmost digivolution source, will this effect De-Digivolve past the Tamer or Option card?
De-Digivolve 1 will be activated three times. Even if the top card becomes a Tamer or Option card, the top card will continue to be trashed by De-Digivolve.
Data Sources
Lv.6 Chaosdramon EX3-013 SR Mega | Virus | Machine Digivolve: 1 from [Machinedramon] [On Play] [When Digivolving] By placing up to 3 red or black level 5 cards with [Cyborg] in their traits and different card numbers from your hand or trash under this Digimon as its bottom digivolution cards, <De-Digivolve 1> 1 of your opponent's Digimon for each card placed by this effect. [All Turns] When this Digimon would be deleted or returned to your hand or deck, you may trash 2 level 5 cards in this Digimon's digivolution cards to prevent it from leaving play.
Lv.6 Chaosdramon EX3-013 SR Mega | Virus | Machine Digivolve: 1 from [Machinedramon] [On Play] [When Digivolving] By placing up to 3 red and/or black level 5 cards with [Cyborg] in their traits and different card numbers from your hand and/or trash under this Digimon as its bottom digivolution cards, <De-Digivolve 1> 1 of your opponent's Digimon for each card placed by this effect. [All Turns] When this Digimon would be deleted or returned to your hand or deck, you may trash 2 level 5 cards in this Digimon's digivolution cards to prevent it from leaving play.
Lv.6 Chaosdramon EX3-013 SR
Mega | Virus | Machine
{{DigivolveFromNames|1|Machinedramon}}
[On Play] [When Digivolving] By placing up to 3 {{Colour|red}} and/or {{Colour|black}} level 5 cards with the [Cyborg] trait and different card numbers from your hand and/or trash under this Digimon as its bottom digivolution cards, <De-Digivolve 1> 1 of your opponent's Digimon for each card placed by this effect.
[All Turns] When this Digimon would be deleted or returned to your hand or deck, you may trash 2 level 5 cards in this Digimon's digivolution cards to prevent it from leaving play.Lv.6 カオスドラモン EX3-013 SR 究極体 | ウィルス種 | マシーン型 【登場時】【進化時】自分の手札かトラッシュから、特徴に「サイボーグ型」を持つ赤か黒のLv.5のカードナンバーの異なるカード3枚までをこのデジモンの進化元の下に置くことで、相手のデジモン1体を置いた1枚ごとに≪退化1≫。 【お互いのターン】このデジモンが消滅するときか、手札、デッキに戻るとき、このデジモンの進化元から、Lv.5のカード2枚を破棄することで、消滅せず、手札、デッキに戻らない。