What makes one card rarer, or more wanted, than another. Each game has its own names, so they're tagged by game.
Chase card
Collector slangAll games
The most wanted card or cards in a set, the ones people open packs hoping for.
Why it matters: Chase cards are a big part of what drives a set's sealed prices, and most packs won't have one. It's about demand, not just rarity. See Lorcana chase cards.
Related: Hit · Grail · Case hit
Grail
Collector slangAll games
A collector's personal dream card, the one they want most (Sports Illustrated).
Why it matters: It's personal, not a price tier. A seller calling a card a grail says nothing about whether the price is fair.
Related: Chase card · PC
Case hit
Collector slangAll games
Collector slang for a card believed or observed to appear roughly once per sealed case. It isn't a guaranteed rate unless the publisher explicitly says so.
Why it matters: A case can have none, or more than one. Riot, which publishes Riftbound rates, says they "are not guarantees" (Riot); Pokémon, Lorcana and One Piece publish none.
Related: Case · Hit · Dead box
Master set
Collector slangPokémon
Every card in a set, including every variant such as reverse holos and secret rares.
Why it matters: A master set costs far more than one copy of each card number. Check which a checklist or price means; people disagree on whether promos count.
Related: Reverse holo · Secret rare
Secret rare
Collector slangAll games
A card numbered past the set's printed total, like 116/084 (CGC). One Piece prints its own Secret Rare code (SEC); Pokémon now uses names like Hyper Rare instead (Pokémon).
Why it matters: A number above the set total is the quickest way to spot a top card in a photo. See how to find a set's secret rares.
Related: SIR (Special Illustration Rare) · Hyper Rare · SEC (Secret Rare)
Alt art
Collector slangAll games
Collectors' umbrella term for a version of a card with a different illustration from the standard one. Each game has its own official names, like Illustration Rare in Pokémon (Pokémon), parallel in One Piece and Showcase in Riftbound (Riot). Not the same as full art, which spreads the usual art across the whole card.
Why it matters: Two copies of the "same" card can be very different prices. Check which version a listing means.
Related: Parallel · Full art · IR (Illustration Rare)
Parallel
Official termAll games
Another version of the same card number with a different finish or art. In One Piece it usually means alternate art, not just foil (Bandai).
Why it matters: A parallel can cost many times the standard card with the same number.
Related: Alt art · SEC (Secret Rare)
Full art
Official termPokémon
A card whose artwork covers the whole face, not just the art box (CGC).
Why it matters: Full art isn't alt art: a Pokémon Ultra Rare is a full-art card, while Illustration Rares use new illustrations.
Related: Alt art · SIR (Special Illustration Rare)
Holo
Official termAll games
A card with holographic foil on its artwork.
Why it matters: Holo alone isn't a big pull anymore: every modern Pokémon pack has several foils.
Related: Reverse holo · Cold foil
Reverse holo
Official termPokémon
A Pokémon card with foil everywhere except the art box. Most cards in a set have one (CGC).
Why it matters: Usually cheap, but part of a master set, and a few are worth more than the standard version.
Related: Holo · Master set
Promo
Official termAll games
A card given out outside regular packs: in boxed products, at events or with a purchase. Pokémon promos carry a black star marked PROMO.
Why it matters: Promo doesn't mean rare. Box promos are made in volume; some event promos are scarce.
Related: Elite Trainer Box (ETB) · Collection box · Serialized
Serialized
Official termAll games
A card stamped with its own number from a fixed run, like 01/25. Lorcana plans 23 serialized copies of each Illustrious card per set (Disney Lorcana).
Why it matters: Check the number is printed by the publisher. A collector number like 199/198 isn't a serial number.
Related: Secret rare · Promo
IR (Illustration Rare)
Official termPokémon
An alternate-art Pokémon card with a full illustration, marked with one gold star (Pokémon).
Why it matters: A main collecting tier. Many are cheap; the popular Pokémon carry the price.
Related: SIR (Special Illustration Rare) · Alt art · Secret rare
SIR (Special Illustration Rare)
Official termPokémon
An alternate-art version of a Pokémon ex or Supporter, marked with two gold stars (Pokémon, CGC).
Why it matters: Often among a set's top chase cards. Two stars alone don't make an SIR; the color matters (see the symbols above).
Related: IR (Illustration Rare) · Hyper Rare · Chase card
Hyper Rare
Official termPokémon
Gold cards marked with three gold stars, what older sets called secret rares (Pokémon). The Mega Evolution era adds Mega Hyper Rares.
Why it matters: Not always the priciest card in a set: SIRs can sell for more.
Related: SIR (Special Illustration Rare) · Secret rare
Double Rare
Official termPokémon
The rarity for regular Pokémon ex cards, marked with two black stars (Pokémon).
Why it matters: The most common ex tier, so rarely the chase.
Related: SIR (Special Illustration Rare) · ACE SPEC
ACE SPEC
Official termPokémon
Powerful Trainer and Energy cards limited to one per deck, with their own rarity since Temporal Forces (Pokémon).
Why it matters: A gameplay rule first. The rarity label doesn't make a card valuable.
Related: Double Rare
Enchanted
Official termLorcana
Borderless alternate-art Lorcana cards with a rainbow "inkwash" foil, numbered past the main set (Disney Lorcana).
Why it matters: Long Lorcana's chase tier; since Fabled, Iconic sits above it. See Lorcana chase cards.
Related: Iconic · Epic · Chase card
Iconic
Official termLorcana
Lorcana's rarest pack tier: two per set, with full-card art and 3D hot stamping (Disney Lorcana).
Why it matters: Disney Lorcana calls them far less common than Enchanted, and prices tend to reflect that.
Related: Enchanted · Epic
Epic
Official termLorcanaRiftbound
In Lorcana, 18 frameless rainbow-foil cards per set, rarer than Legendary but not Enchanted (Disney Lorcana). In Riftbound, Epic is a regular rarity above Rare (Riot).
Why it matters: Same word, different meaning by game. Check which game a listing is for.
Related: Legendary · Enchanted · Showcase
Legendary
Official termLorcana
The top of Lorcana's original rarities, found in a pack's rare slots (Disney Lorcana).
Why it matters: Often the playable chase, but not the rarest: Epic, Enchanted and Iconic are all rarer.
Related: Epic · Enchanted
Cold foil
Official termLorcana
The finish on Lorcana's regular foils: the foil is printed over the card, which reduces curling (ComicBook).
Why it matters: A finish, not a rarity. Any card can turn up as a foil.
Related: Holo · Enchanted
SEC (Secret Rare)
Official termOne Piece
One Piece's top regular rarity, printed on the card next to its number, like OP17-118 (Bandai).
Why it matters: Often among a set's most valuable regular pulls, but special versions like SP, TR and manga art can sell for more.
Related: SP (Special) · Treasure Rare (TR) · Manga Rare
SP (Special)
Official termOne Piece
An earlier card reprinted in a later set with new, often striking art. Bandai lists them as Specials (Bandai). Gundam uses SP the same way.
Why it matters: Check the set code and number to know which printing you're buying.
Related: SEC (Secret Rare) · Parallel
Manga Rare
Collector slangOne Piece
Collectors' name for top One Piece art versions drawn as manga panels. Bandai calls the newest ones Super Alt-Art, "covered with designs from the ONE PIECE manga" (Bandai).
Why it matters: Often among a set's most expensive cards, but listings label them inconsistently. Check the card number and photos.
Related: SEC (Secret Rare) · Parallel · Chase card
Treasure Rare (TR)
Official termOne Piece
A special-treatment One Piece rarity marked TR (Bandai). Not every set has one.
Why it matters: Confirm the TR mark before paying a TR price.
Related: SEC (Secret Rare) · SP (Special)
DON!! cards
Official termOne Piece
One Piece's resource cards: each player has a separate 10-card DON!! deck (Bandai). Special-finish versions are collected.
Why it matters: A gold or foil DON!! plays the same as any other; the value is cosmetic.
Related: SP (Special) · Parallel
Showcase
Official termRiftbound
Riftbound's collector versions: alternate art, Overnumbered and Signature cards. They play exactly like the standard card (Riot).
Why it matters: TCGplayer files all three under Showcase, so it's the filter to use when hunting Riftbound chase cards.
Related: Overnumbered · Signature · Alt art
Overnumbered
Official termRiftbound
Artist-illustrated Riftbound cards numbered past the set total, with extra foil treatments (Riot).
Why it matters: Among the hardest Riftbound pulls. Riot's published rates are averages, not guarantees.
Related: Signature · Showcase · Secret rare
Signature
Official termRiftbound
An Overnumbered card with a foil copy of the artist's signature, printed at the factory, not hand-signed (Riot). Its number carries an asterisk, like 189*/166.
Why it matters: Riftbound's top pulls. Check the listing shows the signature and the asterisk.
Related: Overnumbered · Showcase