Q1: What does a card with "X in its text" refer to?
It refers to a card that contains the specified text or icon in its name, traits, effects, inherited effects, (Rule), digivolution requirements, DNA digivolution, DigiXros requirements, burst digivolve, App Fusion, or Link. For example, a card with Knightmon in its text would include cards with the name DarkKnightmon and cards with the text Knightmon in their effects.
Zenith BT21-087 R LIBERATOR [Start of Your Turn] If you have 2 or less memory, set it to 3. [On Play] Reveal the top 3 cards of your deck. Among them, play 1 [Vemmon] without paying the cost or add 1 card with [Vemmon] in its text to the hand. Trash the rest. --- [Security] Play this card without paying the cost.
Zenith BT21-087 R LIBERATOR [Start of Your Turn] If you have 2 or less memory, set it to 3. [On Play] Reveal the top 3 cards of your deck. Among them, play 1 [Vemmon] without paying the cost or add 1 card with [Vemmon] in its text to the hand. Trash the rest. --- [Security] Play this card without paying the cost.
Zenith BT21-087 R LIBERATOR [Start of Your Turn] If you have 2 or less memory, set it to 3. [On Play] Reveal the top 3 cards of your deck. Among them, play 1 [Vemmon] without paying the cost or add 1 card with [Vemmon] in its text to the hand. Trash the rest. ---
ゼニス BT21-087 R 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。 【登場時】自分のデッキの上から3枚オープンする。その中の「ベムモン」1枚をコストを支払わずに登場させるか、「ベムモン」の記述があるカード1枚を手札に加える。残りは破棄する。 --- 【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。