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.
Lv.4 Snatchmon BT21-058 C Champion | Unknown | Unknown/LIBERATOR [On Play] [When Digivolving] Reveal the top 3 cards of your deck. Add 1 card with [Vemmon] in its text among them to the hand. Trash the rest. Then, you may place up to 2 [Vemmon] from your trash as 1 of your Digimon's bottom digivolution cards. --- Inherited: [All Turns] [Once Per Turn] When any [Vemmon] are returned to the bottom of the deck from this Digimon's digivolution cards, delete 1 of your opponent's Digimon with a play cost of 4 or less.
Lv.4 Snatchmon BT21-058 C Champion | Unknown | Unknown/LIBERATOR [On Play] [When Digivolving] Reveal the top 3 cards of your deck. Add 1 card with [Vemmon] in its text among them to the hand. Trash the rest. Then, you may place up to 2 [Vemmon] from your trash as 1 of your Digimon's bottom digivolution cards. --- Inherited: [All Turns] [Once Per Turn] When any [Vemmon] are returned to the bottom of the deck from this Digimon's digivolution cards, delete 1 of your opponent's Digimon with a play cost of 4 or less.
Lv.4 Snatchmon BT21-058 C Champion | Unknown | Unknown/LIBERATOR [On Play] [When Digivolving] Reveal the top 3 cards of your deck. Add 1 card with [Vemmon] in its text among them to the hand. trash the rest. Then, you may place up to 2 [Vemmon] from your trash as 1 of your Digimon's bottom digivolution cards. --- Inherited: [All Turns] {{OncePerTurn}} When any [Vemmon] are returned to the bottom of the deck from this Digimon's digivolution cards, delete 1 of your opponent's Digimon with a play cost of 4 or less.