Ink cards are played to pay the cost of 'glimmers', which allow you to use characters, items, and actions to affect the state of play
(6/6/2025) If a card in your graveyard has in its mana cost, X is 0 for the purpose of determining its mana value and you must choose 0 as the value of X when casting it without paying its mana cost.
Realistically, I think a Naya Enchantments build running Terra and Yenna is the way to go for this combo in Standard
Single rare Pokmon cards have also fetched large amounts of money in the past, including a first-edition shiny Charizard card - which was holographic and shadowless - that was sold at an auction for $264,000 (197,000), alongside an incredibly rare Pokmon card signed by the president of The Pokmon Company, Tsunekazu Ishihara, that went for almost $250,000 (187,000)