Tartarian Cards is a trading-card and gaming retailer based at 19747 Ventura Boulevard in Tarzana, California. Its online store serves collectors and players with individual cards, sealed products, and supplies across a wide range of games. The selection includes Magic: The Gathering, Pokémon, One Piece, Disney Lorcana, Flesh and Blood, Final Fantasy, Gundam, Yu-Gi-Oh!, and Star Wars: Unlimited, alongside sports cards, graded cards, Funko products, and miniatures-related accessories.

Customers can browse singles and sealed items such as booster packs, boxes, starter decks, and collection sets, as well as cards in different languages and collectible promos. Tartarian Cards also stocks gaming essentials including dice, sleeves, deck boxes, binders, playmats, storage, and other accessories. The store provides a card condition guide and deckbuilder, and features a buylist for customers interested in selling cards. It advertises purchases of Magic, One Piece, and Pokémon singles, offering up to 85% for staples. Events are also listed, giving customers another way to engage with the gaming community.