Finding cards and reading deck codes in Lolumen's library

Lolumen's Hearthstone card library and deck reader answer two everyday questions: what does this card do, and what is in this deck code. This guide covers what each page shows today, using only what's on the pages themselves.

#The library at a glance

The library page is the overview. A Standard and Wild toggle switches format, and a search box sits at the top. Three quick links jump straight to Reign of the Black Empire, the Legendaries, and the cards banned now.

Below that are the counts: 1,323 cards in Standard, 47 sets in the library with Core and Event included, and 135 cards in Reign of the Black Empire. The Hearthstone hub puts the whole collectible library at 6,884 cards.

The Standard sets section lists the eight sets in rotation, each with its release year and card count:

• Core: 289
• Event: 22
• Into the Emerald Dream: 183
• The Lost City of Un'Goro: 183
• Across the Timeways: 183
• Cataclysm: 164
• Escape from the Violet Hold: 164
• Reign of the Black Empire: 135

A "Show as a table" toggle lays the same list out as a table. The page also notes that the 2025 expansions rotate out with the first expansion of 2027, usually in March.

#The Standard mana curve

The library charts every Standard card by cost, from 0 to 10 and up. 2 mana is the most common cost with 273 cards, followed by 3 mana with 257 and 4 mana with 206. At the top end there are 32 cards at 9 mana and 21 at 10 or more. It's a quick way to see how much of the pool sits at each cost.

#Bans

The "Banned right now" section lists every card banned in Standard and Wild. Lolumen keeps it by hand from Blizzard's announcements. Today it lists none in either format. When Blizzard bans or unbans cards, the blog covers the announcement, and this section is where the current list lives.

#Searching for cards

The card search looks through card names and card text. You can also ask for exactly what a deck needs: a keyword, an Attack or Health value, a cost, a class together with its Neutral cards, a tribe or an expansion.

Filters live in the address too, so a search can be shared as a link. Reign of the Black Empire opens the newest set, Legendaries opens every Legendary, and Standard limits the results to the current format.

#A card's own page

Every card has a page with its art, its text and its stats: class, type, rarity, mana, Attack and Health. It also names the set and its year, the formats the card is legal in, its crafting cost in dust and its artist. M.O.T.H.E.R., for example, shows as a 10-mana 9/7 Neutral Legendary from Reign of the Black Empire (2026), legal in Standard and Wild, 1,600 dust to craft, with art by Mooncolony. That's the card's cost after Patch 37.0.2. Card data and images come from HearthstoneJSON by HearthSim.

#Reading a deck code

The deck reader takes a deck code, or the whole export you copy out of the game. It shows the list, the mana curve, the format and the crafting cost in dust. Reading a deck needs no account; saving one does. The same reader also sits on the library page, and community decks are one link away.

#Where to go next

• The live meta shows class win rates and play share from tracked ranked games.
• The tracker records your own games, and Analytics shows your win rates with confidence ranges.
• Hearthstone on Lolumen gathers all of it, plus the daily games.

#Sources

• Lolumen card library
• Lolumen card search
• M.O.T.H.E.R. on Lolumen
• Lolumen deck reader
• Hearthstone on Lolumen