Rulings
Q1: Which card must be placed in digivolution requirements for this card's When Start of Your Main Phase effect?
A black Digimon card with "Cyborg type" or "Machine type" in its trait and a black Digimon card with "Machine type" in its play cost.
Q2: The situation is that only the top card of the opponent's security is face-up. If you activate the When Digivolving effect of this card, which card of the security should you turn face up?
Turn the second card from the top of the security face up.
Q3: What happens to a card placed face up in security by an effect?
It becomes ostensible security and remains public. The rules are the same as for normal security, except that it is ostensible.
Q4: What happens when checking a security placed face down?
Checked as published. The rules are the same as for normal checks, except as published.
Q5: If a security placed face up is checked, does the card's Security effect trigger?
Yes, triggered.
Q6: What happens when shuffling a security that contains a security placed face up?
The security that was face up is turned back face down and then shuffled. After shuffling, the cards are not turned face up.
Data Sources
Altea BT20-086 U LIBERATOR [Start of Your Turn] If you have 2 or less memory, set it to 3. [Start of Your Main Phase] By placing 1 play cost 4 or lower black Digimon card with the [Cyborg] or [Machine] trait from your hand or trash as any of your [Cyborg] or [Machine] trait Digimon's bottom digivolution card, flip your opponent's top face-down security card face up. --- [Security] Play this card without paying the cost.
Altea BT20-086 U
LIBERATOR
[Start of Your Turn] If you have 2 or less memory, set it to 3.
[Start of Your Main Phase] By placing 1 {{Colour|black}} Digimon card with the [Cyborg] or [Machine] trait with a play cost of 4 or less from your hand or trash at the bottom of your Digimon with such trait, flip your opponent's top face down security card face up.
[Security] Play this card without paying the cost.
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[Security] Play this card without paying the cost.アルテア BT20-086 U リベレイター 【自分のターン開始時】メモリーが2以下なら、3にする。 【自分のメインフェイズ開始時】自分の手札/トラッシュから、特徴に「サイボーグ型」/「マシーン型」を持つ黒の登場コスト4以下のデジモンカード1枚を特徴に「サイボーグ型」/「マシーン型」を持つ自分のデジモンの進化元の下に置くことで、相手の裏向きのセキュリティを上から1枚表向きにする。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。