how to know if a yugioh card is rare The Most Valuable Starlight Cards In Yu-Gi-Oh! What to Know: Yu-Gi-Oh! Card
Description
Its just shorthand for an additional mana cost you can also pay by tapping your artifacts or creatures

Assuming the nature of the Dot Code bars on the Celebi card is typical for all other cards the Small format bar encodes the numbers 1 through 19 (skipping zero and starting at one, which is generally not the case when using binary counting) the Large format bar encodes the numbers 25 through 53 for some reason numbers 20-24 are not used its also possible that, for other multi-card programs (like NES game e-Reader cards) larger numbers are used to keep track of which cards were scanned

Some value the card at several thousand dollars due to its unique nature

You know, if I sell a card for 10 bucks, it's like, 'Okay, awesome, I made $10.' But seeing just pure excitement and surprise from being able to give away something, it's just worth more. Through his generosity and growing YouTube channel, Coop has made a few regulars at his booth, including 9-year-old Wyatt and his dad, Matt

For graded cards, PSA (Professional Sports Authenticator) is the go-to

Incapsula incident ID: 1344000740132648920-305044679282397835
