Learning how to build a Riftbound deck from scratch feels daunting until you see the structure underneath it. Every deck follows the same rules. Every decision flows from the same starting point. Once you know the order to work through it, building a functional deck is less a creative leap and more a process you can follow.
Page last updated: May 10, 2026. All deck construction rules verified against the official Riftbound Core Rules (RUP3, updated March 30, 2026).
This guide is for two types of readers. You might own a Champion Deck and want to start customising it with singles. Or you might want to build around a champion who does not have a pre-built product available, like Jax or Draven. Either way, the process is the same. We will walk through it step by step.
If you want a quick-reference checklist of deck building principles rather than a step-by-step walkthrough, our Deck Building Tips page covers that separately. This guide is about the build process itself.
What You Need to Know Before You Start
Before buying a single card, it helps to understand what a legal Riftbound deck actually looks like. These are the official requirements from the Core Rules.
| Component | Requirement | Notes |
|---|---|---|
| Champion Legend | 1 | Sets your Domain Identity. All cards must match. |
| Chosen Champion | 1 | Placed in the Champion Zone before the game starts. Must be a champion unit with the matching tag. |
| Main Deck | At least 40 cards | Units, Spells, Gear, and up to 3 Signature cards. Max 3 copies of any named card. Most players build to exactly 40 for consistency. |
| Rune Deck | Exactly 12 Rune cards | Must match your Domain Identity. Kept separate from the Main Deck. |
| Battlefields | Determined by Mode of Play | In standard play you bring 3. No duplicates allowed. Subject to Domain Identity where applicable. |
The rules set a minimum of 40 cards in the Main Deck. In practice, you want to build to exactly 40. Every card you add beyond your best choices makes it less likely you draw the cards you want when you need them. A tight 40-card deck is a more reliable one.
Step 1: Choose Your Champion
Your Champion Legend is not just the card you put in the Legend Zone. It is the identity of your entire deck. The champion you choose determines which Domain colours you can use, which cards are legal, and what your deck is fundamentally trying to do every turn.
If you already own a Champion Deck, your champion is already chosen. But understanding why that champion works the way they do will shape every decision in the steps that follow.
If you are building from scratch, start here. Every current Riftbound champion has two Domains. Those two Domains define the colour palette your entire deck will be built from.
| Champion | Domains | Playstyle |
|---|---|---|
| Jinx | Chaos / Fury | Aggressive, explosive. Rewards attacking and going wide. |
| Viktor | Mind / Chaos | Spells and augmentation. Builds power over time. |
| Lee Sin | Calm / Body | Flexible, tempo-based. Punishes opponents who overextend. |
| Fiora | Order / Body | Duelist focus. Wins individual fights to build board control. |
| Rumble | Fury / Mind | High-power threats. Gear-focused and snowball-heavy. |
| Vi | Body / Fury | Combat pressure. Conquers battlefields and chains attacks. |
| Vex | Chaos / Mind | Control and disruption. Shuts down opponent momentum. |
| Jax | Body / Order | Weapon synergy and mid-range combat. Builds around Gear. |
| Draven | Fury / Order | Fast and direct. Deals damage efficiently and pushes tempo. |
Note that Jax and Draven do not have pre-built Champion Decks available to buy. If you want to play them, building from singles is your only option. Our Jax guide and Draven budget build are good starting points for both.
Domain Identity is the hard rule. Cards included in your Main Deck must abide by your Domain Identity. A card with two Domains can only be used in a deck whose Domain Identity contains both of those Domains. You cannot splash colours or include off-Domain cards. Build within your legend’s domains and build toward a coherent strategy within them.
Step 2: Understand Your Deck Requirements
Now you know your champion, you need to understand exactly what legal deck construction looks like before you start picking cards. This step is worth ten minutes before you browse a single listing on TCGPlayer.
Already own a champion deck and want to improve it rather than build from scratch? How to upgrade your Riftbound champion deck.
The Chosen Champion
Your Chosen Champion is a champion unit card whose champion tag matches your legend. It starts every game in the Champion Zone, not in your deck. You choose which specific card fills this slot during deck building.
You can include up to 3 additional copies of that same card in your Main Deck. Those copies are shuffled in like any other card and drawn during the game. This means you can have up to 4 total copies of your Chosen Champion’s card across both zones, and the Main Deck copies behave as regular cards during play.
Main Deck Composition
Your Main Deck must contain at least 40 cards. The allowed card types are:
- Units (your fighters)
- Spells (instant effects)
- Gear (equipment attached to units)
- Signature cards (up to 3 total, must match your Champion Legend’s tag)
You may include up to 3 copies of any card with the same name. Cards with different subtitles are considered different names and each have their own limit. So you could run 3 copies of Jax, Grandmaster at Arms and 3 copies of Jax, Weapons Master, because they have different full names.
Signature Cards
Signature cards are a special type that must match your Champion Legend’s tag. Your entire deck may contain no more than 3 Signature cards total, regardless of name. These are typically powerful, champion-specific cards and they count toward your overall 3-of limit per named card.
Ready to start browsing singles for your build? TCGPlayer is the best place to find individual cards, with multiple sellers and live pricing so you can see what things actually cost before you commit to a list.
Step 3: Build Your Unit Curve
Units are the core of any Riftbound deck. They fight for Battlefields, trigger your champion’s abilities, and create the board pressure that wins games. Before you think about spells or gear, get your units right.
Every unit has an Energy cost printed in the top left corner. Early in the game your Energy pool is small. If all your units cost 4 or more Energy, you will have nothing to do for the first two turns and fall behind before you have started. This is the most common mistake in early deck builds.
What a Curve Actually Means
A curve is just the spread of Energy costs across your units. You want a shape that lets you play something every turn, from turn 1 onward, and still have powerful units to play later in the game when your Energy pool is larger.
A rough starting curve for a 40-card deck might look like this:
| Energy Cost | Approximate Count | Role |
|---|---|---|
| 1 to 2 | 8 to 10 units | Early pressure. Contest Battlefields fast. Keep opponent reactive. |
| 3 to 4 | 6 to 8 units | Mid-game power. Bigger bodies with better abilities. |
| 5 and above | 2 to 4 units | Late-game finishers. High Might, powerful effects. Expensive. |
These are starting numbers, not rules. Some champions, like Draven, want more low-cost units to push early tempo. Others, like Viktor, lean toward mid and high-cost cards and use spells to manage the early turns. Follow your champion’s playstyle.
Might Matters
Each unit has a Might value. Might is how much damage it deals in combat. A unit with high Might can kill multiple lower-Might units in sequence thanks to how excess damage works in Riftbound. When you are choosing between two units at the same Energy cost, lean toward the one with higher Might if you are building an aggressive deck. For control builds, survival and abilities often matter more.
The Rule of Threes
If a unit is good enough to put in your deck, run 3 copies. If it is situational or you are not sure yet, start with 1 or 2. Consistency comes from seeing your best cards regularly, not from having a wide variety of single copies. When I first looked at card lists online, the number of 3-ofs in competitive builds surprised me. It is a real principle, not a coincidence.
Target for a starting deck: 20 to 24 unit cards in total. Below 20 and you will struggle to contest Battlefields consistently. Above 24 and you are probably not leaving enough room for spells and gear that make your units stronger.
Step 4: Choose Your Spells and Gear
Spells and Gear are your support cards. They do not fight on their own, but they change the outcome of fights and give your units abilities or protection they would not otherwise have.
What Spells Do
Spells are one-time effects. They can deal damage, remove threats, draw cards, buff your units during combat, or disrupt what your opponent is doing. The key decision with spells is timing: some spells can only be played during your turn, others can respond to your opponent’s actions during a Showdown.
For a starting build, lean toward spells that affect the board immediately. Spells that deal direct damage or give your units temporary power buffs tend to have more reliable impact than complex conditional effects while you are still learning the game.
What Gear Does
Gear is equipment that attaches to units at your Base and stays in play. Unlike spells, Gear provides ongoing value. A well-placed Gear card can turn a cheap unit into a consistent threat. Jax is the clearest example of a champion whose strategy revolves around Gear, with several cards that reward having equipment in play or attached.
How Many to Include
A starting split might look like this:
| Card Type | Starting Range | What to Prioritise |
|---|---|---|
| Units | 20 to 24 | Your curve, as outlined in Step 3. |
| Spells | 8 to 12 | Removal and combat tricks first. Draw effects second. |
| Gear | 4 to 8 | Only if your champion or strategy rewards it. Less for spellcasters, more for combat champions like Jax or Vi. |
| Signature cards | Up to 3 total | Included if they fit your strategy. Not required. |
These splits flex depending on your champion. A Viktor deck might run more spells and fewer units. A Jax deck might load up on Gear. Follow what your champion rewards, not a fixed formula.
Do not over-commit to spells early. Spells are powerful but they do not hold Battlefields. You need units present on the board to contest locations. A common early mistake is building a spell-heavy deck that runs out of bodies while the opponent quietly controls every Battlefield.
Step 5: Build Your Rune Deck
Your Rune Deck is exactly 12 Rune cards. These are kept separate from your Main Deck and shuffled at the start of every game. You draw from this deck during play to generate the resources you need to play cards.
How Runes Work
Runes produce two types of resources: Energy and Power.
Energy has no Domain. It is used to pay the numeric cost shown in the top left corner of a card. Every Rune produces Energy, so every Rune contributes to your ability to play cards each turn.
Power has a Domain. It is used to pay the Domain-specific symbol costs that appear alongside Energy costs on some cards. A symbol that looks like the Fury icon on a card requires Power of the Fury Domain to pay for it. You use the term “1 Power” when describing this cost, not “1 Wild Power.”
Most Runes produce Power matching their own Domain. A Fury Rune produces Fury Power when recycled. A Mind Rune produces Mind Power. This is why your Rune choices need to match the Power demands of your cards.
Domain Requirements
All 12 Rune cards must match your Domain Identity. If your champion has two Domains, all your Runes must be of one or the other Domain. You cannot include Runes from outside your Domain Identity.
Splitting Your Runes
If your champion uses two Domains, you need to decide how to split your 12 Rune slots between them. Start by looking at the Power costs across your cards. Count how many cards require Fury Power, how many require Mind Power (or whatever your two Domains are), and use that ratio to guide your split.
A 6/6 even split is the safest starting point. It gives you reliable access to both types of Power. If your deck leans heavily into one Domain, shift accordingly. A 8/4 or 9/3 split makes sense if one Domain is clearly dominant in your card selection.
| Deck Lean | Rune Split | When to Use |
|---|---|---|
| Even split | 6 / 6 | Starting point for any two-Domain champion. Safe and consistent. |
| Primary lean | 8 / 4 | Most cards use one Domain’s Power. The secondary Domain is splashed lightly. |
| Heavy lean | 9 / 3 or 10 / 2 | Deck is almost entirely one Domain. Only a few cards need the secondary Power. |
Universal Power exists. Some non-basic Rune cards produce Universal Power, which can be used to pay for Power costs of any Domain. If you find runes in your Domain Identity that produce Universal Power, they offer flexibility at the cost of potentially less reliable Energy generation. Worth including if your card list demands it, but not essential for a first build.
Battlefields
Your Battlefield cards are also built alongside your Rune Deck. In standard play you bring 3. Subject to Domain Identity where applicable. No two Battlefields in your selection can share the same name. Choose Battlefields whose abilities support what your deck is trying to do. They are part of your strategy, not an afterthought.
Step 6: Test and Adjust
Your first complete deck list is not your final deck. It is your starting hypothesis. The only way to know if it works is to play it.
What to Look for in Your First Games
Do not make changes after one bad game. Play at least five to ten games with the same list before you draw conclusions. You are looking for patterns, not single incidents. Specific things to watch for:
| Problem | Likely Cause | What to Change |
|---|---|---|
| Nothing to do in early turns | Curve too expensive. Not enough 1 to 2 cost units. | Add cheaper units. Cut one or two expensive cards. |
| Running out of cards mid-game | No draw effects. Too many one-for-one trades with no refill. | Add 1 to 2 spells that draw cards or create card advantage. |
| Stuck with the wrong Power type | Rune split does not match your actual card Power demands. | Recount your Power costs and adjust the split accordingly. |
| Never drawing key cards | Key cards at 1 copy. Not enough redundancy. | Increase to 2 or 3 copies. Cut the weakest cards to make room. |
| Losing Battlefields every turn | Not enough units. Too many spells relative to board presence. | Add 2 to 3 more units. Cut a spell or two. |
| Winning easily then running out of steam | Deck is fast but has no follow-through. | Add 1 to 2 high-cost finishers. Give the late game more teeth. |
Change One Thing at a Time
When you do make changes, swap 2 to 3 cards and test again. If you swap ten cards at once, you will not know which change fixed the problem. Small, deliberate adjustments give you real feedback.
Tracking Your Results
A simple note after each game is enough. Win or loss, what happened in turns 1 to 3, and what you were missing. After ten games a pattern will usually emerge clearly. The most useful question is not “why did I lose?” but “what did I wish I had drawn?”
Give competitive decks time to settle. Copying a tournament list online without understanding it is a fast way to feel confused. Lists built for competitive play assume you know every card interaction in them. Start with a simpler version of the same strategy and add complexity once you understand the core of what the deck is doing.
Putting It Together: a Checklist for Your First Build
Before you finalise your list and start buying cards, run through this:
| Check | What to Confirm |
|---|---|
| Champion Legend chosen | Domain Identity is clear. You know which two Domains you are building within. |
| Chosen Champion selected | One champion unit with matching tag. You know which specific card fills this slot. |
| Main Deck is at least 40 cards | Aim for exactly 40 for consistency. All cards are within your Domain Identity. |
| No more than 3 copies of any named card | Checked across your full list including your Chosen Champion copies. |
| Signature cards counted | 3 total maximum. All match your Champion Legend’s tag. |
| Unit count is 20 or above | Enough bodies to contest Battlefields throughout the game. |
| Curve has early plays | 8 to 10 units at 1 to 2 Energy. Something to do from turn 1. |
| Rune Deck is exactly 12 | All Runes match Domain Identity. Split reflects your actual Power demands. |
| Battlefields selected | 3 cards. No duplicates. Their abilities support your strategy. |
Where to Get the Cards
TCGPlayer is the best option for buying singles to build a custom list. Multiple sellers compete on the same platform, so prices are transparent and you can compare before you commit. Search by card name, filter by condition, and buy exactly what you need rather than opening packs and hoping.
Amazon is worth checking if you want to pick up a booster box alongside your singles build. Opening packs can fill gaps and give you cards to trade from.
Not Sure Which Champion to Build Around?
If you have not committed to a champion yet, a pre-built Champion Deck is still the best starting point. You get a legal, playable deck out of the box, you learn how that champion is meant to be played, and you have a base to customise from rather than building on a blank slate.
Which Champion Deck Should I Buy First?
Our comparison guide walks through all the available Champion Decks, who each one is for, and which one matches your style. If you are still deciding on your champion, start here.
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