Quick answer: Builder Base 2.0 is a two-stage versus mode where each attack is worth up to 6 stars (3 Bronze in Stage 1, 3 Silver in Stage 2), there is no daily attack limit, and clearing 7-12 stars for the daily Star Bonus plus progressing your Builder Hall is how you unlock B.O.B — a permanent 6th builder for your home village.
The Builder Base is Clash of Clans' second village, and since the Builder Base 2.0 rework it plays nothing like the old Versus Battles most players remember. Instead of a single sudden-death attack against half a base, Builder Base 2.0 is a two-stage assault worth up to 6 stars, with no daily attack cap, its own troops and defenses, and one payoff that reaches all the way into your main account: B.O.B, a permanent 6th builder for your home village. If you stopped touching the Builder Base years ago, the mode you left is not the mode that exists now.
How Does Builder Base 2.0 Actually Work?
Builder Base 2.0 works as a two-stage versus match: you attack an opponent's full base across two consecutive stages, and your total destruction and stars determine your trophy result. Unlike the old single-attack Versus Battles, you now get two swings at the same base — Stage 1 and Stage 2 — and your performance across both stages is what wins or loses the match. Trophy changes are determined by the number of stars you earn and the percentage of destruction you achieve, scaled by the Builder Hall levels of both players.
The two stages are the heart of the mode. In Stage 1 you deploy an army and try to destroy as much as possible; destroying 100% of the base earns 3 Bronze Stars. Then Stage 2 begins on the same base with the damage carried over, and destroying it fully earns 3 Silver Stars — for a maximum of 6 stars and 200% total destruction across both stages. Because Stage 2 starts from wherever Stage 1 left off, a strong first stage makes the second stage far easier, which is why funneling and clearing efficiently in Stage 1 matters even if you cannot three-star it outright.
Crucially, loot is never stolen in Builder Base 2.0. Attacking generates Builder Gold and defending generates Builder Elixir, both awarded from a shared pool rather than taken from your opponent, so there is no downside to being attacked. That single design choice removes the "protect my loot" anxiety of the home village and makes the Builder Base purely a progression race. It also changes how you should think about every decision in the mode: because you can never lose resources, there is no reason to hoard or to hide, only to keep attacking and keep both builders working — the Builder Base rewards activity and punishes nothing except idle builders.
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You get an unlimited number of attacks per day in Builder Base 2.0 — there is no daily attack limit, and you can keep attacking even after you have earned your daily Star Bonus. This is a major change from the old Builder Base, where attacks were capped, and it means the mode rewards active players who want to grind Builder Gold and Builder Elixir rather than just tapping through a fixed number of daily battles.
The practical implication is that your Builder Base progression speed is limited by your builders and storages, not by an attack cap. If you have Builder Gold to spend and a builder free, you can farm as many matches as you want to fund the next upgrade. Most players still stop after clearing the daily Star Bonus because that is where the guaranteed reward sits, but nothing prevents you from grinding further when you are pushing to finish a key upgrade.
How Does the Builder Base Star Bonus Work?
The Builder Base Star Bonus is a daily one-time loot reward you unlock by earning a set number of stars across your attacks, and it requires between 7 and 12 stars depending on your league — the higher your league, the more stars you need and the larger the bonus loot you receive. Because each attack is worth up to 6 stars across its two stages, you can clear the Star Bonus in as few as two strong attacks, or across several partial ones.
| League tier | Stars for Star Bonus (approx.) | Bonus loot |
|---|---|---|
| Lower leagues | Around 7 stars | Smaller Builder Gold and Elixir reward. |
| Mid leagues | Around 9-10 stars | Moderate reward. |
| Higher leagues | Up to 12 stars | Largest Builder Gold and Elixir reward. |
The Star Bonus is the single most important daily objective in the Builder Base, because it is a large, guaranteed chunk of Builder Gold and Elixir that dwarfs what individual raids pay. The efficient routine is to log in, take enough two-stage attacks to clear the star requirement, collect the bonus, and spend the loot on upgrades — that alone keeps a Builder Base progressing steadily without grinding.
What Are the Best Builder Base Troops and Armies?
The best Builder Base armies in 2026 pair a strong core troop with support that funnels and cleans up, and a reliable Builder Hall 10 composition is Raged Barbarians backed by Night Witches with a few Minions — roughly 60% Raged Barbarians, 30% Night Witches, and 10% Minions. That mix gives you volume, spawned skeleton pressure, and air cleanup, and it works across both attack stages because it destroys buildings quickly and consistently.
Other strong Builder Hall 10 strategies include Boxer Giant smash attacks, Baby Dragon spam, Cannon Cart pushes, and Electrofire Wizard-based armies, all of which rely on funneling the base so your main damage dealers reach the core rather than wrapping the outside. The Electrofire Wizard, unlocked when you upgrade the barracks at Builder Hall 10, is a standout addition because of its chained damage, and P.E.K.K.A and Baby Dragon are strong upgrade targets depending on the army you commit to.
| Builder Base army | Core idea | Best for |
|---|---|---|
| Raged Barbarians + Night Witches | Volume plus spawned skeletons | Consistent two-stage clears at BH10. |
| Boxer Giant smash | Tanky Giants funneled to the core | Breaking heavy central defenses. |
| Baby Dragon spam | Air swarm that avoids ground traps | Bases weak to air. |
| Electrofire Wizard | Chained ranged damage | Tightly packed compartments. |
The most important Builder Base attacking skill is not troop choice — it is funneling. Because a Builder Base is symmetrical and compact, deploying troops to guide your main force into the center rather than letting it circle the perimeter is what turns a 60% attack into a two-star or three-star clear. Practice the funnel before chasing the "best" army, because a well-funneled average army beats a badly deployed strong one.
How Do You Unlock the 6th Builder (B.O.B) in Clash of Clans?
You unlock the 6th builder by progressing your Builder Base to the required Builder Hall level and then completing the B.O.B unlock line, which activates B.O.B — the Builder Base 2.0 replacement for the older O.T.T.O Bot. B.O.B (short for the Master Builder's latest bot) becomes a permanent 6th builder in your home village, giving your main account a sixth construction slot that dramatically speeds up home village upgrades.
The key trade-off is where your builders live. Before B.O.B, the Master Builder could travel between the Builder Base and the home village; once B.O.B is unlocked, B.O.B stays permanently in the home village as your 6th builder while the Master Builder remains in the Builder Base. So unlocking B.O.B effectively splits your building workforce: the Builder Base keeps its own builders, and your home village gains a permanent extra one. Historically this mechanism was called O.T.T.O, and many older guides still use that name — B.O.B is the current version of the same "unlock a 6th home village builder through Builder Base progress" system.
This is the single biggest reason to take the Builder Base seriously even if you only care about your home village. A 6th builder means one more simultaneous upgrade running at all times, which compounds over a maxing account into weeks of saved wall-clock time. If your home village progression feels slow, unlocking B.O.B is often the highest-impact project available to you.
Why Do Builder Base Rewards Matter for Your Home Village?
Builder Base rewards matter for your home village primarily through the 6th builder (B.O.B) and through gems, because progressing the Builder Base unlocks that permanent extra builder and awards gems from Builder Base achievements that you can spend anywhere in the game. The Builder Base runs on its own Builder Gold and Builder Elixir, which stay inside the Builder Base and cannot be moved to your home village — so the crossover value is the builder and the gems, not the loot itself.
It is worth being precise about what does and does not cross over, because misinformation is common. Hero equipment ores — the Shiny, Glowy, and Starry Ores used to upgrade home village hero equipment — come from your home village Star Bonus and events, not from the Builder Base, so do not expect Builder Base play to feed your hero equipment. What the Builder Base genuinely provides your main account is the 6th builder, achievement gems, and the general progression milestones that unlock those rewards.
| Builder Base reward | Crosses to home village? | Notes |
|---|---|---|
| B.O.B (6th builder) | Yes | Permanent extra home village builder — the main prize. |
| Gems (achievements) | Yes | Spendable anywhere in the game. |
| Builder Gold / Elixir | No | Stays in the Builder Base for its own upgrades. |
| Hero equipment ores | No | Come from home village Star Bonus and events instead. |
The takeaway is that the Builder Base is worth doing mainly to unlock B.O.B and bank achievement gems, then to maintain casually. Once B.O.B is secured, the Builder Base becomes a low-priority side track you upgrade slowly, because its remaining rewards do not feed your home village the way that first 6th builder did.
How Should You Build Your Builder Base Defense?
You should build your Builder Base defense to cost attackers stars across both stages rather than to protect loot, because loot is never stolen in Builder Base 2.0 — the only thing your defense affects is your trophy result and your defending Builder Elixir income. A layout that centralizes the Builder Hall, spreads your strongest defenses to cover the core, and forces attackers to break through walls to reach the middle is what limits how many of the six available stars an opponent can take.
The two-stage format changes defensive priorities. Because an attacker gets two swings at your base with damage carrying over, a defense that merely survives Stage 1 is not enough — it needs to still cost stars in Stage 2 after taking damage. Defenses like the X-Bow (unlocked at Builder Hall 10), Roaster, and Mega Tesla anchor a base by punishing the concentrated pushes that Stage 2 attackers rely on. Copying a proven Builder Hall 10 layout is a reasonable shortcut, but the underlying principle is to make both stages hard, not just the first.
Defense remains secondary to offense in the Builder Base, though. Because winning attacks is what earns Builder Gold and clears the Star Bonus, an upgraded offense progresses your base faster than an upgraded defense — so treat defensive upgrades as a supplement to a strong attacking core, not the priority.
What Is the Fastest Way to Progress the Builder Base?
The fastest way to progress the Builder Base is to clear the daily Star Bonus every day, keep both Builder Base builders working at all times, and upgrade offense and the Builder Hall in step so you keep winning matches as you climb. Because the Star Bonus is a large guaranteed reward and attacks are unlimited, the mode rewards a short daily routine far more than occasional binges — a few two-stage attacks a day compounds quickly.
Prioritize your Builder Hall and troop upgrades over pure defense, because winning attacks is what earns Builder Gold, clears the Star Bonus, and pushes toward the Builder Hall level that unlocks B.O.B. Defenses matter for trophies and for the defending Builder Elixir income, but a Builder Base that can reliably two-star opponents earns loot faster than one that only defends well. Keep your builders busy and your offense ahead of your Builder Hall, and the mode progresses on autopilot.
How Does the Builder Base Fit Into Your Overall Account?
The Builder Base fits into your overall account as the mode you rush once, to unlock B.O.B, and then maintain casually — because that 6th builder is the highest-leverage reward in the game for a maxing account. Every additional builder means one more simultaneous home village upgrade, and going from five builders to six is a permanent, compounding speed boost that no amount of farming can replicate. If your home village feels slow, unlocking B.O.B often beats grinding more loot.
That 6th builder pairs directly with the rest of your account plan. The extra construction slot lets you act faster on the ordering in the Upgrade Priority Guide, the loot to feed all six builders comes from the routine in the farming guide, and the Clan Capital guide covers a third cooperative track whose Raid Medals buy the magic items you spend on those upgrades. For a full ranked plan of what to build first with your new sixth builder, the Upgrade Priority Advisor reads your player tag and returns an ordered list.
New players sometimes ask whether to build the Builder Base early or ignore it. The answer is to progress it deliberately toward B.O.B, then stop sweating it — the Clash of Clans beginner guide covers how the Builder Base slots into an early-game routine without stalling your home village.
Frequently Asked Questions
How many attacks can you do per day in Builder Base 2.0?
There is no daily attack limit in Builder Base 2.0 — you can attack as often as you like, even after earning your daily Star Bonus. This is a change from the old Builder Base, which capped daily attacks, and it means active players can grind Builder Gold and Elixir freely.
How do the two attack stages work in Builder Base 2.0?
Each Builder Base attack has two stages on the same base: Stage 1 awards up to 3 Bronze Stars for full destruction, and Stage 2 continues from that damage and awards up to 3 Silver Stars, for a maximum of 6 stars and 200% destruction. A strong Stage 1 makes Stage 2 much easier because the damage carries over.
How many stars do you need for the Builder Base Star Bonus?
You need between 7 and 12 stars for the daily Star Bonus, depending on your league — higher leagues require more stars but pay a larger loot reward. Since each attack is worth up to 6 stars, two strong attacks can clear the requirement.
How do you unlock the 6th builder in Clash of Clans?
You unlock the 6th builder, B.O.B, by progressing your Builder Base to the required Builder Hall level and completing the B.O.B unlock line. B.O.B then stays permanently in your home village as a 6th builder, while the Master Builder remains in the Builder Base — this system was previously called O.T.T.O.
What is the best Builder Base army in 2026?
A reliable Builder Hall 10 army is roughly 60% Raged Barbarians, 30% Night Witches, and 10% Minions, which clears both attack stages consistently. Boxer Giant smash, Baby Dragon spam, and Electrofire Wizard armies are also strong, but funneling your troops to the core matters more than the exact composition.
Do Builder Base rewards help my home village?
Yes, but selectively. The Builder Base gives your home village a permanent 6th builder (B.O.B) and achievement gems, which are the real crossover value. Builder Gold and Builder Elixir stay in the Builder Base, and hero equipment ores come from your home village Star Bonus and events, not the Builder Base.
Is the Builder Base still worth doing in 2026?
Yes, the Builder Base is worth doing mainly to unlock B.O.B, the 6th home village builder, which adds a permanent simultaneous upgrade slot and saves weeks of maxing time. After B.O.B is unlocked, the Builder Base becomes a low-priority side track you can upgrade casually.
Should you upgrade offense or defense first in the Builder Base?
Upgrade offense first, because winning attacks is what earns Builder Gold, clears the daily Star Bonus, and pushes toward the Builder Hall level that unlocks B.O.B. Loot is never stolen in Builder Base 2.0 — attacking earns Builder Gold and defending earns Builder Elixir from a shared pool rather than from your opponent — so defense only affects your trophies and defending Builder Elixir income. A base that reliably clears both attack stages therefore progresses far faster than one that only defends well, which is why offensive upgrades and Builder Hall levels should always lead your upgrade plan.