Free · Fan-made · In your browser

CONCLAVE

Play Riftbound— the League of Legends trading card game — in your browser. Build a legal deck from all 781 cards while a rules-accurate engine enforces every play. Duels vs AI and hotseat are on the way.

Play now See the roadmap

781: cards catalogued
6: domains to master
4: sets, rules-enforced

An unofficial fan project — not affiliated with or endorsed by Riot Games.

Built to be exact

A referee that never blinks

Most digital tabletops let you move the pieces and trust everyone to play fair. Conclave runs an authoritative rules engine underneath — so the game itself keeps you honest.

An engine, not a tabletop

Every action is validated against the full rulebook. Illegal plays are rejected outright — costs, priority, the chain, and combat all resolve exactly as written.

Legend-first deckbuilding

Choose your legend, then build within its identity. Two-domain gating, copy limits, and rune counts are enforced live — you can only ever assemble a legal deck.

Duel the AI, or a friend

Face a competent AI opponent or pass-and-play in local hotseat. Full pre-game mulligan, phase-by-phase turns, targeting, and showdowns — the complete match loop.

781 cards, four sets

The complete Riftbound card pool is catalogued and searchable. Filter by domain, cost, and type to find exactly what your strategy needs.

No account required

Jump in as a guest — no sign-up wall. Your decks are saved right in your browser, ready the next time you return. Sign in only if you want to.

Cheat-resistant core

The rules live in a pure functional core with no hidden state — the same design that makes full replay, rewind, and future online play possible without trusting the client.

The six domains

Choose the power you wield

Every Riftbound legend draws on up to two of six domains, and Conclave enforces that identity live while you build. Pair them well, and their strengths compound into a strategy all your own.

Fury

Aggression

Reckless and relentless — trade cards for damage and end the duel before it truly begins.

Calm

Guile

Patient board control, combat tricks, and counters that punish anyone who overreaches.

Mind

Knowledge

Stay a step ahead — dig deep, plan, and spring hidden cards at the perfect moment.

Body

Momentum

Grow your runes faster than anyone and land haymakers turns ahead of schedule.

Chaos

Recursion

Nothing stays buried — recycle your trash into fuel and grind out value forever.

Order

Legion

Go wide, rally the ranks, and overwhelm the field with numbers that keep marching.

Every card, playable

The real cards, rules-enforced

Conclave plays the full four-set catalogue — all 781 cards — with their real art. Every cost, keyword, and combat is validated by the engine, so you can only ever make a legal play. Any card still awaiting a scan falls back to a clean code-drawn frame.