By Daniyal Ahmed · Guides Writer
Blox Cards TCG looks simple until your first duel, when the fighter you just played sits there locked, your hand is full of cards you cannot afford, and your opponent's field is already three fighters deep. It is the oldest trading-card game on Roblox, and it punishes sloppy deck-building harder than almost any other game here — but a tight 40-card deck turns those same duels into wins. This guide covers how duels work, the three card types, and how to build a first deck that wins. Start by claiming the free BB and packs on our Blox Cards TCG codes page — all 36 working codes pay out before your first duel, and they buy the packs your deck is built from.
▶ Play Blox Cards TCG on Roblox
Blox Cards TCG, by the Chaos Organization, is a full trading-card battler that has been running on Roblox since 2015 — one of the oldest card games on the platform, with thousands of collectible cards drawn from Roblox history, memes and other trading-card games. You build a 40-card deck, then duel AI opponents and other players in turn-based battles where every card you play costs studs, and the goal is simple: reduce your opponent's Life to 0 before they do the same to you.
Each player starts a duel with 7 cards in hand and draws one more at the start of every turn. Cards come in five colours and four rarities — Common, Uncommon, Rare, Epic and Legendary — and rarity decides how many copies you can run. The whole game balances three resources: cards in hand, studs to spend, and fighters holding your field.
Redeem the codes first. Open the Shop, hit the aqua Codes button and enter each code exactly — codes are case-sensitive. The 36 working codes pay out thousands of BB plus packs and titles, and BB buys packs, so this is the biggest free head start in the game.
Open your packs and study what you pulled — packs come from the Card Shops in the Main Menu and out in the world. Sort your collection by colour and rarity: whichever colour holds your strongest Fighters is the colour your first deck should lean on.
Build a 40-card deck in the deck builder — collection on the left, deck on the right — and note the builder will not let you leave until the deck holds exactly 40 cards. Keep it simple: mostly one or two colours, so your studs match the cards you want to play.
Play your first battles from the Main Menu's green Play button, starting against AI opponents. Losing to a bot costs nothing, and every duel shows what your deck really does.
Spend your first BB on more packs, not on chasing one specific card. Early on, a wider collection matters more than a single rare — a deeper collection means a better deck.
Every card is one of three types, and a good deck uses all three: Fighters do the fighting, Actions answer problems, and Terrains pay you back every turn they stay in play.
| Card type | What it does |
|---|---|
| Fighter | Stays on the field with Health (green) and Power (orange), and attacks enemy fighters or the opponent directly. Locked for one turn after being played. |
| Action | Triggers its effect immediately, then goes to the graveyard. Removal, healing and card draw live here. |
| Terrain | Stays in play with an ongoing effect until removed or replaced by another Terrain. Some effects can turn a Terrain into a Fighter. |
Fighters are the backbone of every deck, but also the slowest cards you own — a fighter played this turn cannot attack until next turn, and on the very first turn of the player going first, a new fighter is locked for two turns. Play your fighters a turn before you need them, and never leave your field empty going into your opponent's turn.
Deck-building has hard rules: a deck must hold exactly 40 cards, and rarity caps copies — 4 of a Common, 3 of an Uncommon, 2 of a Rare, just 1 of an Epic or Legendary. Tokens cannot be added at all. Those limits keep the game fair: nobody can stack four copies of the strongest card in the game.
Inside those rules, keep your first deck simple: roughly half Fighters, the rest split between Actions that solve problems and Terrains that pay you back every turn. Pick one colour as your main and at most one more as a splash — your studs come in colours, and a hand full of cards you cannot pay for is a hand full of dead draws.
Mind your curve, too: a deck of only expensive cards loses before it gets going, because you cannot afford to play anything early. Mix cheap fighters with a few big finishers, and cut any card that sits unplayed in your hand duel after duel — it is telling you it does not belong.
Studs are the economy of every duel. Each turn you discard one card from your hand onto the baseplate, generating studs in that card's colour, and fighters on your field generate studs in their colour at the end of your turn. That is why deck colour matters: a strong fighter is useless if your studs are the wrong colour to play it.
Attacking is direct: click an unlocked fighter, then click a target on the enemy's field, and when a fighter's Health runs out it is destroyed. Clear the enemy field and your fighters hit the opponent's Life directly — first to 0 wins. Two limits keep duels honest: each field holds at most 8 cards, and drawing from an empty deck costs Life instead, starting at 100 and rising by 100 each time — so a long duel punishes whoever burns through cards fastest.
1. Redeem every code first. Thirty-six codes pay out BB, packs and titles before your first duel — that head start buys the packs your deck is built from.
2. Build around one or two colours. A focused deck draws playable cards and generates matching studs. A five-colour pile draws hands it cannot afford to play.
3. Discard with a plan. The baseplate takes a card every turn, so feed it duplicates and cards you cannot afford — never a card your deck is built around.
4. Play fighters a turn early. A fighter cannot attack the turn it is played, so summon it the turn before you need the damage, not the turn you want to swing.
5. Hold an answer for the big threat. Keep one Action in hand for the enemy fighter that would end you, instead of spending every stud the moment you get it.
6. Rebuild as your collection grows. When you pull a stronger fighter in your colours, cut the weakest card in the same slot — a deck that never changes is a deck falling behind.
| Code | Reward |
|---|---|
BOWLS | Free BB |
BOOTH | Free BB |
PRELUDETOWAR | Free BB |
BATTLESIM | Free BB |
INITIATION | 1,200 BB and a '+PARRY!' Title |
See the full Blox Cards TCG codes list for every working code, the ones worth trying, and the expired list.
Launch Blox Cards TCG, click Shop on the left side of the screen, then click the aqua Codes button. Type a code into the box exactly as shown — codes are case-sensitive — and press Enter. Working codes pay out BB, card packs and exclusive titles.
Exactly 40 — the deck builder will not let you leave until your deck holds 40 cards. Rarity also caps copies: 4 of a Common, 3 of an Uncommon, 2 of a Rare, and only 1 of an Epic or Legendary. Token cards cannot be added to a deck.
Studs are the resource you spend to play cards. Each turn you discard one card from your hand onto the baseplate, which generates studs in that card's colour, and fighters on your field generate studs in their colour at the end of your turn. Cards cost studs in their own colour, so your deck's colours and your studs have to match.
Buy card packs from the Card Shops in the Main Menu and out in the world, paying with BB earned from winning battles and from codes. Open packs to grow your collection, then rebuild your deck around the strongest cards you pull in your colours.
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