Foil card

From MTG Salvation Wiki

Foil cards are premium Magic cards which have a foil or "glossy" finish to them. All foil cards are black-bordered, even those from core sets, except those from Unhinged which are silver-bordered. On the average there is a 1 in 70 chance of getting a foil in a booster pack, which equates to approximately one in six packs or six or seven per box of cards. Urza's Legacy was the first set to feature foil cards in booster packs. However, Lightning Dragon was the first widely-available foil premium card, as it was the card given away at the Urza's Saga prerelease.

If a booster pack contains a foil card it used to replace the card normally found in that rarity. (i.e. the card Shared Triumph is rare, if there was a foil version in a pack it would replace the card found in the rare slot). In every set starting with Time Spiral^[1], a foil card replaces a common card regardless of the rarity of the foil card. This means there is a chance of getting two rares in a single booster pack: one foil rare and one regular one.

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