Here's why:
* Foil cards are a variant: They are a special version of the card with a shiny, foil finish. Not all cards are printed in foil versions.
* Many cards are only non-foil: Especially older sets and common cards, may only have been printed in non-foil versions.
* Rarity doesn't equal foil: Powerful cards can be common, uncommon, rare, or even super rare. Some rare cards are only available in non-foil versions.
How to tell if a card is real:
* Check the printing quality: Look for sharp edges, clean lines, and consistent colors. Fake cards often have blurry or uneven printing.
* Compare to images online: Use online resources like TCGplayer or MTG Salvation to find official images of the card and compare to your own.
* Look for authenticity marks: Some cards have unique features like holographic stamps or specific text patterns that are difficult to replicate.
* Consult with experienced players: If you're unsure, ask a trusted player for their opinion.
Remember: If a card seems too good to be true (like a rare card at an incredibly low price), it probably is. Be cautious when buying cards from unknown sellers, and always do your research!