Quantity No Refunds or Returns on Final Sale Items.
Because paying X is part of the normal casting cost, paying an alternative cost for these cards will result in X=0 unless the alternative cost itself specifies a value for X, such as Lantern Flare or Disrupting Shoal
Starter Decks come in around $10-20, which is highly affordable, especially for anyone who just wants to try the game out, and non-foils from most set releases seem to be under a buck
If all effects are active during the End Phase you can Mill any Noble Knight from the Deck to the GY, return one Noble Knight from the GY back to your Hand, special summon one Noble Knight from your Hand and equip him with a Noble Arms from your Hand if you like and finally Draw 1 Card
In the meantime, check out our other Disney Lorcana articles, such as our feature on Lorcanas first card bans, or our list of the most valuable, sought after cards in seventh Lorcana set, Archazias Island .